Bar Exam (Next Generation) Quiz: Usage Course Of Dealing And Course Of Performance

12 questions · exam conditions

0:00

Usage Course Of Dealing And Course Of PerformanceQuestion 1 of 12

Mesa Vineyards agreed in a signed writing to sell Casa del Vino 4,000 cases of wine per year for three years at $40 per case. The writing said: 'No modification of this agreement shall be binding unless made in writing and signed by both parties.' After a market slump, the parties orally agreed that the price for the second contract year would be $32 per case. Mesa invoiced Casa at $32 per case for 11 months, and Casa paid each invoice. Mesa then sued for the $8-per-case difference on those deliveries, arguing that the oral modification was unenforceable for lack of consideration and for violating the no-oral-modification clause.

Who is likely to prevail in Mesa's suit for the price difference?

Casa, because the no-oral-modification clause is unenforceable as a matter of law between merchants.

Mesa, because the oral modification was unsupported by consideration and is therefore unenforceable as a contract change.

Mesa, because the contract's no-oral-modification clause makes the oral modification ineffective despite the parties' conduct.

Casa, because a UCC modification needs no consideration and the parties' course of performance operated as a waiver of the no-oral-modification clause.

← Back to quizzes

Bar Exam (Next Generation) Quiz

Bar Exam (Next Generation) Quiz: Usage Course Of Dealing And Course Of Performance

Practice Usage Course Of Dealing And Course Of Performance in Bar Exam (Next Generation) with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on Usage Course Of Dealing And Course Of Performance, giving you a quick way to practice the rules, question types, and explanations that matter most for Bar Exam (Next Generation).

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

Who is likely to prevail in Mesa's suit for the price difference?

Casa, because the no-oral-modification clause is unenforceable as a matter of law between merchants.
Mesa, because the oral modification was unsupported by consideration and is therefore unenforceable as a contract change.
Mesa, because the contract's no-oral-modification clause makes the oral modification ineffective despite the parties' conduct.
Casa, because a UCC modification needs no consideration and the parties' course of performance operated as a waiver of the no-oral-modification clause. (correct answer)

Explanation: When you see a dispute over an oral change to a written sales contract, immediately think UCC § 2-209. That provision governs modification, waivers, and "no oral modification" clauses, and it breaks from common-law contract rules in two ways you must remember. Here, the parties' oral agreement to reduce the price to $32 for the second year is enforceable against Mesa. First, under the UCC, a modification needs no consideration; the market slump and the parties' mutual agreement are enough. Second, although the contract contained a no-oral-modification clause, the parties' 11-month course of performance—Mesa invoicing at $32 and Casa paying those invoices—operated as a waiver of that clause. Mesa cannot now retroactively insist on the original price. Therefore Casa prevails. The wrong answer that says no-oral-modification clauses are unenforceable between merchants misses the point: UCC § 2-209(2) expressly makes such clauses enforceable. The answer claiming Mesa wins for lack of consideration reflects the common-law rule, but the UCC expressly abolishes that requirement for modifications of sales contracts. And the answer that the no-oral-modification clause blocks the oral change ignores the waiver-by-conduct doctrine—Mesa's own invoices were the evidence of the waiver. Study tip: On bar-exam contracts questions, always ask whether the contract is for goods. If yes, apply UCC § 2-209 and remember: no consideration needed, and a no-oral-modification clause can be waived by a party's conduct.

Question 2

Delta Sprocket Co. agreed in writing to sell Roto Works, Inc. 200 gear housings per month for two years, with delivery 'on or before the 10th' of each month. Delta delivered the January through June shipments on the 18th of each month, and Roto accepted and paid for each shipment without complaint. On July 2, Roto faxed Delta a letter stating that, because of its production schedule, Roto would 'no longer accept deliveries made after the 10th.' Delta nonetheless delivered the July shipment on July 18, and Roto rejected it.

In the parties' dispute over whether the July delivery was timely, who is likely to prevail?

Roto, because the express delivery term governs and a course of performance can never prevail over it.
Delta, because Roto's repeated acceptance of late deliveries permanently modified the delivery term of the contract.
Roto, because its July 2 notice reasonably retracted the waiver of the delivery date, so the July shipment had to be tendered by the 10th. (correct answer)
Delta, because the July shipment was delivered on the same day of the month as the earlier shipments Roto had accepted.

Explanation: Whenever you see a contract with an express deadline and one party repeatedly accepts late performance, think waiver and retraction, not automatic modification. Under the UCC, Roto's acceptance of the January-through-June shipments on the 18th waived Delta's duty to deliver by the 10th for those shipments. But a waiver affecting the future can be retracted by reasonable notice, unless the other party materially changed its position in reliance. Roto's July 2 fax gave clear, timely notice that strict performance would again be required, and Delta had not relied on the prior indulgence to its detriment. So the original delivery term was restored, the July shipment had to arrive by the 10th, and Delta's July 18 tender was late. The choice saying "the express delivery term governs and a course of performance can never prevail" is too absolute: a course of performance can create a temporary waiver, but after retraction the express term controls. The choice saying Delta "permanently modified" the contract is wrong because waiver is not modification; it is temporary and revocable. And the choice relying on "same day of the month as earlier shipments" ignores that past leniency did not establish a new deadline once Roto reasonably retracted the waiver. Study tip: distinguish modification—a permanent change requiring agreement—from waiver—a voluntary giving up of a right that can be retracted with notice absent reliance. Bar questions often test that distinction through repeated acceptance of late performance.

Question 3

Apex Marine Supply, a Florida dealer in marine hardware, contracted to sell '50 fathoms of 3/4-inch anchor chain' to Beacon Marina, a newly opened retail marina in Georgia that had never bought from Apex. In the marine supply trade, the term '50 fathoms of chain' is uniformly understood to include, at no extra charge, a customary allowance of 10% additional chain for shackles and connecting links. Apex delivered 330 feet of chain (300 feet plus the 30-foot allowance) and billed for 50 fathoms. Beacon, which was unaware of the trade usage, refused to pay for the extra 30 feet.

In the parties' dispute over the extra 30 feet, is Beacon bound by the trade usage?

Yes, because a usage of trade in the seller's trade binds the buyer once it is established by expert testimony.
No, because a party cannot be bound by a usage of trade of which it had no actual knowledge.
No, because a usage of trade cannot give meaning to a term that has an otherwise clear dictionary meaning.
Yes, because a usage of trade of which Beacon should have been aware is relevant, and as a marina operator Beacon should have been aware of it. (correct answer)

Explanation: Whenever a contract dispute turns on a trade term, your first question under the UCC should be: what did the parties know or should they have known? A usage of trade is defined as a practice so regularly observed in a place or vocation that it justifies an expectation of compliance. Crucially, a party is bound not only by usages it actually knew, but also by usages it should have known. Here, the uniform trade meaning of "50 fathoms of chain" includes the customary 10% allowance for shackles and connecting links. Apex delivered exactly that: 300 feet plus a 30-foot allowance. Because Beacon operates a retail marina and therefore should have been aware of the marine-supply industry's understanding, it is bound by that usage even though it had no actual knowledge of it. The choice saying Beacon is bound because it should have been aware, as a marina operator, captures the rule perfectly. The choice rejecting liability because Beacon lacked actual knowledge is wrong: the UCC does not require actual knowledge, only constructive knowledge. The choice saying trade usage cannot override a clear dictionary meaning is also wrong — trade usage routinely gives commercially reasonable meaning to terms, even terms with common meanings. Finally, the choice saying the seller's trade usage binds the buyer once shown by expert testimony overstates the rule: expert testimony can prove the usage, but it binds the buyer only if the buyer knew or should have known it, not merely because the seller established it. Study tip: on bar-exam contract questions, connect trade usage to the "knew or should have known" standard — actual ignorance is not an excuse in a trade you're in.

Question 4

Suncrest Growers contracted to sell Metro Grocers '2,000 cartons of early-season peaches.' Metro rejected the delivery because 20% of the peaches were smaller than Metro expected. Suncrest sued, offering the testimony of its sales manager that Suncrest has always included a 20% tolerance for small fruit in early-season shipments and that two or three other growers in the region sometimes do the same. Suncrest offered no other evidence of the alleged practice and argues that the tolerance is a usage of trade.

Is Suncrest's evidence sufficient to establish a usage of trade?

No, because the contract's stated quantity of 2,000 cartons is definite and controls over any industry practice.
No, because Suncrest has not shown that the 20% tolerance is regularly observed by others in the trade. (correct answer)
Yes, because Suncrest's own consistent practice is evidence that it relied on the tolerance.
Yes, because Suncrest's sales manager testified to the practice and Metro offered no evidence to rebut it.

Explanation: Whenever you see "usage of trade" on a bar exam, remember that it is an industry-wide practice, not a personal habit. Under the UCC, a usage of trade is a practice or method of dealing so regularly observed in a place, vocation, or trade that it justifies an expectation that it will be followed in the transaction. The key is regular observance by others in the trade. Suncrest's evidence fails because it never shows that the 20% small-fruit tolerance is regularly observed in the peach industry. Its sales manager testified only about Suncrest's own practice and that two or three other growers "sometimes" do the same. Occasional, limited conduct is not the widespread, regular pattern the law requires. Therefore, the correct answer is that Suncrest has not shown the tolerance is regularly observed by others in the trade. The other choices miss the point. Saying the stated quantity of 2,000 cartons controls over industry practice is wrong because usage of trade can supplement or explain even definite terms. Suncrest's own consistent practice is also insufficient: one party's repeated conduct may be course of performance, but it does not prove an industry-wide usage. Finally, the fact that the sales manager testified and Metro offered no rebuttal does not help—Suncrest still bears the burden of producing sufficient evidence, and unrebutted testimony that is legally insufficient remains insufficient. Study tip: distinguish "course of performance" (same parties, prior dealings), "course of dealing" (previous transactions between the parties), and "usage of trade" (the whole industry). Only the last requires regional or trade-wide regularity.

Question 5

Precision Fabricators, Inc. agreed in writing to manufacture and deliver 'one custom assembly line' to Tri-State Motors. The parties intended the writing as a complete and exclusive statement of their agreement. It described the line's components in detail but was silent about installation and startup assistance. In two prior contracts between Precision and Tri-State, Precision had always provided installation and startup assistance at no extra charge. When Precision delivered the line and refused to install it, Tri-State sued, relying on the prior course of dealing. Precision argues that the merger clause bars any evidence of the prior course of dealing.

Is Tri-State's course-of-dealing evidence admissible?

Yes, but only because the writing is silent; had the writing addressed installation, the course-of-dealing evidence would be inadmissible.
Yes, because a course of dealing may supplement the terms of a writing even if the writing is a complete and exclusive statement of the agreement. (correct answer)
No, because a writing intended as a complete and exclusive statement may not be supplemented by prior course-of-conduct evidence.
No, because a course of dealing may only explain ambiguous terms and cannot create an obligation the writing omits.

Explanation: Whenever you see a UCC sale-of-goods contract with an integration clause and evidence of prior dealings, think about UCC § 2-202. Unlike common-law parol evidence, the UCC allows a final writing to be supplemented by course of dealing, course of performance, or usage of trade—even if the writing is a complete and exclusive statement—so long as the evidence does not contradict an express term. Here, the writing is silent about installation and startup assistance. Tri-State's prior course of dealing shows that Precision always provided that assistance at no extra charge. That evidence does not contradict anything in the writing; it fills a gap. Therefore, it is admissible. The answer choice saying "yes, but only because the writing is silent" is too narrow: even if the writing had addressed installation, course-of-dealing evidence could still explain an ambiguous term, though it could not flatly contradict a clear one. The choice rejecting admissibility because the writing was "complete and exclusive" misreads the UCC—completeness does not bar course-of-dealing evidence. And the choice limiting course of dealing to "only explain ambiguous terms" is also wrong: the UCC allows it to supplement a writing, not merely clarify ambiguity, so it can supply an omitted consistent term. Your takeaway: on the bar exam, for sales of goods, integration clauses exclude prior agreements and contradictions, but not course of dealing, course of performance, or usage of trade. Ask whether the evidence contradicts the writing or merely supplements it.

Question 6

Atlantic Produce Co. had sold citrus for years to three regional supermarket chains under contracts in which Atlantic's invoices stated that 'standard field box' meant a 45-pound box, and those chains paid the invoices. Atlantic then contracted for the first time with GreenMart, a new grocery chain, to sell '1,000 standard field boxes of oranges.' Atlantic delivered boxes weighing 45 pounds each. GreenMart rejected them, insisting that 'standard field box' in the region means a 40-pound box, a weight reflected in the published standards of the regional citrus exchange. Atlantic claims that its invoicing practice with the three chains is a course of dealing that binds GreenMart.

Will Atlantic's prior invoicing practice bind GreenMart?

No, because a usage of trade is binding only if it is embodied in a trade code or similar published record.
Yes, because Atlantic's practice with the three chains is a usage of trade binding on all buyers in that trade.
Yes, because GreenMart is a merchant and should have known of Atlantic's invoicing practice in the industry.
No, because a course of dealing must be conduct between the parties to the particular transaction, and Atlantic's dealings with other grocers do not bind GreenMart. (correct answer)

Explanation: Whenever you see a contract term with an ambiguous definition like "standard field box," your first task is to separate two distinct UCC concepts: a course of dealing (conduct between the same parties in prior transactions) and a usage of trade (a practice regularly observed in the industry). Here, Atlantic's invoicing practice with the three chains is a classic course of dealing, but it only exists between Atlantic and those specific chains. Because GreenMart was not a party to those prior transactions, that conduct cannot be used to interpret the new contract with GreenMart. Furthermore, this practice is not a usage of trade—the regional exchange's published 40-pound standard contradicts it, so it is not an industry-wide norm. This is why the correct answer is the one stating that a course of dealing must be conduct between the parties to the particular transaction, and Atlantic's dealings with other grocers do not bind GreenMart. Now, consider the distractors. The first choice ("embodied in a trade code") is wrong because a usage of trade does not require a written code—it can be established by regular practice, though it still wouldn't apply here. The second choice ("usage of trade binding on all buyers") mislabels Atlantic's private practice as an industry-wide usage, which the facts do not support. The third choice ("GreenMart is a merchant and should have known") conflates merchant status with constructive knowledge of a specific seller's private invoicing habit—merchant status doesn't impose knowledge of a course of dealing between other parties. For the exam, remember the key question: "Are these the same parties?" If the practice involves third parties, it is not a course of dealing binding on the new party.

Question 7

Liberty Foods contracted to buy 'Grade A dark amber maple syrup' from Vermont Pure Maple Co. The National Maple Syrup Producers Association publishes a grading code that defines the Grade A dark amber color standard. Vermont Pure claims that its syrup meets the code's standard; Liberty claims it does not. At trial, Vermont Pure calls an expert who testifies that the grading code is regularly observed throughout the syrup trade and that, under the code, syrup of the color shipped is Grade A. Liberty objects that the expert's opinion about the code's meaning is a question of law for the court, while Vermont Pure insists that the existence and scope of a usage of trade are questions of fact for the jury.

How should the trial court rule on the admissibility and allocation of the proof?

The jury decides both the regularity of the usage and the code's meaning, because both are questions of fact.
The court decides both issues, because the interpretation of a written trade code is a question of law.
The jury decides whether the code is regularly observed in the trade, but the court decides the meaning of the code's text. (correct answer)
The expert's testimony should be excluded because the code itself is the best evidence of the usage and speaks for itself.

Explanation: When you see a question involving a trade code or usage of trade, remember the judge-jury split: the existence and scope of a usage of trade are questions of fact for the jury, but the interpretation of a written document's text is a question of law for the court. Here, the expert testifies that the grading code is "regularly observed" in the trade (a factual claim about industry practice) and that the syrup meets the code's standard (an interpretive claim about the code's text). Therefore, the jury must decide whether the code is regularly observed, while the court decides the meaning of the code's text—which is exactly what the correct answer states. The choice that says the jury decides both the regularity and the code's meaning is wrong because it improperly treats the interpretation of a written text as a pure fact question. The choice that says the court decides both issues is wrong because it ignores that the regularity of a practice is an empirical, factual matter for the jury. Finally, the choice that would exclude the expert's testimony because the "code itself is the best evidence" misapplies the best evidence rule—that rule concerns proving the content of a writing, not the admissibility of expert opinion to explain trade usage, and a written code does not speak for itself. Your takeaway: whenever a trade usage or custom is at issue, split the questions—the jury determines what the trade actually does, and the court determines what the written words mean.

Question 8

Norton Chemicals agreed to sell Parker Labs all of Parker's requirements of reagent-grade acetone for one year, with each order 'to be shipped within two days of placement, F.O.B. Norton's plant.' Norton routinely shipped each monthly order two days late and from a warehouse other than the plant named in the contract. Parker's accounts payable department paid each invoice automatically upon receipt, without reviewing shipping dates or shipping points. Ten months into the contract, Parker audited the account, discovered the deviations, and sued for breach. Norton defended on the ground that Parker's ten monthly payments established a course of performance.

Has Parker's payment conduct established a course of performance?

No, because Parker's payments concerned only the price of the acetone and had nothing to do with Norton's deliveries.
Yes, because Parker paid each monthly invoice without objection, and the payments were repeated and consistent.
No, because Parker's payments were made automatically and without knowledge that the shipments were late or from the wrong warehouse. (correct answer)
Yes, because Parker's repeated payments are a course of dealing that binds Parker as a merchant in the industry.

Explanation: When you see a UCC contracts question about course of performance, course of dealing, or usage of trade, remember these are three distinct sources of extrinsic evidence. Course of performance concerns conduct under the current contract, course of dealing concerns prior contracts between the same parties, and usage of trade concerns industry norms. The critical requirement for a course of performance is that the conduct be known and accepted without objection. Here, Parker's payments were made automatically by its accounts payable department, which never reviewed the shipping dates or points. Because Parker lacked knowledge that Norton was shipping two days late and from the wrong warehouse, its payments cannot constitute knowing acquiescence to those deviations. The correct answer is the one stating that Parker's payments were made automatically and without knowledge of the late or mis-sourced shipments. Now consider the distractors. The choice claiming payments concerned only price and had nothing to do with deliveries is a trap: payment is a contractual performance, but the flaw here is not the subject matter—it's the absence of knowledge. The choice arguing that repeated, consistent payments without objection establish a course of performance overlooks that mere automation is not "acceptance" or "acquiescence" when the party is unaware of the underlying facts. Finally, the choice that calls these payments a "course of dealing" binding Parker as a merchant conflates two separate doctrines—course of dealing refers to prior contracts, not the current one—and merchant status does not impute knowledge of specific delivery deviations. Study tip: For any course-of-performance question, always ask did the party actually know about the other side's conduct? If not, no course of performance is formed, no matter how many payments or shipments occur.

Question 9

For the last three years, MetalWorks, Inc. has sold bolts to BuildRight Corp. under successive one-year contracts. Each year MetalWorks shipped 5% more bolts than the stated contract quantity and invoiced for the excess, and each year BuildRight paid the invoice but sent a letter saying it would not accept or pay for overshipments in the future. This year's contract states that MetalWorks will sell BuildRight 'exactly 10,000 bolts.' MetalWorks again shipped 10,500 bolts and billed for the excess, and BuildRight refused to pay for the 500 extra bolts.

Does MetalWorks have a course of dealing entitling it to payment for the 500 extra bolts?

No, because the parol evidence rule bars evidence of prior dealings once the parties have executed a written contract that is intended as a final expression of their agreement.
No, because BuildRight's repeated written objections show there was no common basis of understanding that overshipments were acceptable. (correct answer)
Yes, because BuildRight's payment of the three prior invoices was conduct establishing a common basis of understanding.
Yes, because the parties' repeated transactions over three years established a usage of trade between them.

Explanation: Whenever you see prior transactions between the same parties, think "course of dealing" under the UCC: a sequence of conduct that is reasonably construed as a common basis of understanding. The key word is common—both sides must share the understanding. Here, BuildRight paid each overshipment but simultaneously sent written objections saying it would not accept or pay for future excess. That means there was never a mutual agreement that overshipments were acceptable; BuildRight's payments were made under protest, not as assent. So the correct answer is No, because BuildRight's repeated written objections show there was no common basis of understanding that overshipments were acceptable. The parol evidence rule does not bar this result: the UCC explicitly allows evidence of course of dealing, course of performance, and usage of trade to explain or supplement a written contract, even a final one. The trap in that choice is treating the rule as a blanket exclusion. BuildRight's payment of the three prior invoices also fails because it ignores the contemporaneous objections—conduct plus objection cannot create a shared understanding. And the parties' repeated transactions over three years is not a "usage of trade," which is an industry-wide practice, not a bilateral history; moreover, the objections defeat any trade usage inference. Study tip: when a party pays but objects in writing, ask "was there a meeting of the minds?" Payment without protest may create a course of dealing; payment plus protest does not.

Question 10

Quality Foods, Inc. agreed in writing to buy '100 commercial freezer units' from ColdChain Equipment Co. The contract stated: 'This writing is the complete and exclusive statement of the parties' agreement, and no course of performance, course of dealing, or usage of trade may be used to interpret or supplement its terms.' A dispute arose over whether the term 'commercial freezer units' requires self-defrosting capability. ColdChain offered evidence that during the first 18 months of performance it had delivered freezer units without self-defrosting features and Quality had accepted and paid for them without objection, establishing a course of performance.

Should the court admit ColdChain's course-of-performance evidence?

No, but only because the writing is a complete and exclusive statement of the agreement, which bars all extrinsic evidence.
No, because the contract expressly and carefully negated reliance on course of performance, course of dealing, and usage of trade. (correct answer)
Yes, because evidence of course of performance is always admissible to explain the meaning of an ambiguous term.
Yes, because parties may not contractually waive the right to prove their actual understanding of their agreement.

Explanation: When you see a contract dispute with a "complete and exclusive statement" clause plus an express ban on course of performance, course of dealing, or usage of trade, you are testing UCC § 2-202 and the parties' power to define the interpretive rules for their own agreement. That clause matters: the UCC permits parties to "carefully negate" the use of these extrinsic guides. Here, ColdChain's evidence of accepted non-self-defrosting units would ordinarily be a classic course of performance showing how the parties understood "commercial freezer units." But the contract did not merely say it was final; it expressly and carefully negated reliance on course of performance, course of dealing, and usage of trade. That explicit waiver is enforceable, so the court should exclude the evidence. The first wrong answer—that the writing bars all extrinsic evidence just because it is a complete and exclusive statement—overstates the rule. A merger clause alone does not necessarily bar all evidence of meaning; the express negation is what defeats this evidence. The answer claiming course of performance is always admissible to explain ambiguity is also wrong: ambiguity may trigger interpretation, but the parties can contractually waive those usual interpretive aids. Finally, the suggestion that parties cannot waive their right to prove actual understanding misunderstands UCC policy; sophisticated parties may contractually limit what evidence the court may consider. Study tip: on bar questions, look for "complete and exclusive" language plus specific negation of course of performance/dealing/usage—that combination is a deliberate UCC waiver and will exclude the evidence.

Question 11

Summit Paper Co. agreed in a fully integrated written contract to sell Crestline Press, Inc. 500 reams of 'No. 2 white offset paper' every quarter for two years. The contract expressly defined 'No. 2 white offset paper' as 'paper with a brightness level of 86.' A usage of trade in the paper industry uses 'No. 2 white offset' to mean paper with a brightness level of 84. In their three prior dealings, Summit and Crestline had always treated the term as requiring brightness 86, and Crestline accepted Summit's first two deliveries at brightness 86 without objection. Summit's most recent delivery tested at brightness 84, and Summit claims that the delivery conformed because the industry usage controls.

In Crestline's action for breach, how should the court resolve the dispute?

The express definition controls, so the brightness-84 delivery is a breach and the conflicting industry usage cannot change that term. (correct answer)
The usage of trade controls because both parties are merchants and industry usages of which they are aware are binding on them.
The course of performance controls because the parties' actual conduct under the contract is the best evidence of their agreement.
The court must first decide whether the term is ambiguous before it may consider the usage of trade or course of dealing.

Explanation: Whenever you see a UCC contracts question involving contract interpretation, immediately think about the hierarchy of evidence. Under UCC § 1-303, express terms prevail over course of performance, which prevails over course of dealing, which prevails over usage of trade. The parol evidence rule allows extrinsic evidence to explain or supplement a contract, but never to contradict an express term. Here, the fully integrated written contract expressly defines "No. 2 white offset paper" as requiring brightness 86. That express definition is an unambiguous term of the agreement. Under the UCC hierarchy, that express term must control over any conflicting industry usage. Even though the industry uses 84, and even though both parties are merchants, the express definition of 86 wins. Since Summit delivered paper at brightness 84, it breached the contract. The "usage of trade" choice is a classic trap—it correctly states that merchants are bound by industry usages, but it ignores the UCC's explicit rule that express terms trump trade usages. The "course of performance" choice is similarly flawed; while past acceptance of 86 deliveries is relevant, it actually supports the express term (86) rather than contradicting it, and even if it conflicted, express terms still win. Finally, the "court must first decide ambiguity" choice misstates the law—while courts sometimes consider extrinsic evidence to determine if a term is ambiguous, here the term is expressly defined and unambiguous, so the court can enforce it directly without a threshold ambiguity finding. Your takeaway: when a contract contains an express definition, stop there. The UCC's hierarchy is your roadmap—express terms are the undisputed king. Watch for answer choices that try to elevate course of dealing or usage of trade above a clear, written term.

Question 12

Tanner Mills and Loom House, Inc. had dealt with each other for five years, and in every prior transaction between them the term '500 cones of worsted yarn' meant cones weighing 1.5 pounds each. The parties then signed a new contract for '500 cones of worsted yarn' per quarter. Tanner's first three deliveries under the new contract contained 1.75-pound cones, and Loom's warehouse accepted and used them without objection. A usage of trade in the yarn industry defines the standard worsted-yarn cone as 1.5 pounds. Loom now insists that the new contract requires 1.5-pound cones and has rejected Tanner's fourth delivery of 1.75-pound cones.

Which party's interpretation of 'cone' should the court adopt?

Loom's, because the parties' five-year course of dealing is entitled to more weight than Tanner's three deliveries.
Loom's, because the industry usage of trade supplies the standard meaning of an ambiguous term.
Neither, because the conflicting course evidence makes the contract too indefinite to be enforced.
Tanner's, because Loom accepted Tanner's first three deliveries under the new contract without objection. (correct answer)

Explanation: When a contract term like "cone" is ambiguous, the UCC tells courts to resolve its meaning by looking at the parties' actual performance first, not at outside standards. This question tests the hierarchy of interpretive evidence: course of performance under the current contract outweighs course of dealing from earlier transactions and usage of trade from the industry. Here, Tanner's first three deliveries under the new contract used 1.75-pound cones, and Loom's warehouse accepted and used them without objection. That repeated acceptance is a course of performance—it is the parties' own practical construction of the contract while performing it. Because this course of performance is entitled to the greatest weight, the court should adopt Tanner's interpretation. The choice arguing that the five-year course of dealing deserves more weight gets the hierarchy backwards: the most recent performance under the disputed contract is more persuasive than older dealings. Similarly, the choice relying on industry usage of trade overlooks that usage of trade is subordinate to course of performance when the parties have shown their own meaning through conduct. And the choice claiming the contract is too indefinite is wrong because UCC gap-filling and extrinsic evidence exist precisely to resolve ambiguous terms, not to invalidate them. So when you see conflicting interpretive clues, remember the priority: express terms, then course of performance, then course of dealing, then usage of trade. Acceptance without objection is usually the strongest signal of meaning.