- Who is likely to prevail on the meaning of 'bushel'?
Answer: Buyer, because the parties' course of dealing is a more reliable indicator of their common understanding than the regional usage of trade.
When you see a UCC interpretation question pitting prior dealings against trade custom, your first move is to recall the priority rules in § 1-303. The official comment is decisive here: "As between a course of dealing and a usage of trade, the course of dealing controls."
Buyer prevails because over three years and four contracts, both parties consistently treated "bushel" as 56 pounds — that is a classic course of dealing establishing a common basis of understanding for the current transaction. While the regional grain trade's 60-pound usage is relevant and could supplement the agreement, it directly conflicts with the parties' established pattern, and the UCC's priority rule gives course of dealing the edge.
The distractor claiming the current contract is not a "particular transaction" misreads the statute — course of dealing exists precisely to interpret the current transaction based on prior conduct. The answer suggesting Seller wins because usage of trade binds unless excluded also misses the priority rule; usage is relevant, but it yields to an established course of dealing when the two conflict. Finally, the claim that course of dealing cannot supplement an express term like "10,000 bushels" fails because "bushel" is undefined — the quantity is express, but its meaning is ambiguous, which is exactly what § 1-303(d) lets course of dealing clarify.
Study tip: when course of dealing and usage of trade collide on the exam, course of dealing wins every time — the parties' shared history is a more reliable window into their intent than industry custom.
- Who is likely to prevail?
Answer: Seller, because the express term controls and, in any event, Seller validly retracted any waiver before Buyer relied on it.
Whenever you see course-of-performance evidence in a UCC contracts question, remember the hierarchy: express terms usually prevail over course of performance, but course of performance can show waiver or modification. Here, the contract expressly said "F.O.B. Seller's plant," so Seller's delivery obligation was to make solvent available at its plant. Seller's ten-month practice of delivering to Buyer's warehouse was a course of performance that could give meaning to the delivery term and might show a waiver of the F.O.B. term. However, § 2-209(5) allows a party to retract a waiver affecting the executory portion of the contract by reasonable notice, unless the other party materially changed position in reliance. Seller sent written notice retracting before the next installment, and Buyer has not changed position in reliance. Therefore, Seller validly retracted any waiver, and the express F.O.B. term controls going forward.
"Course of performance gave particular meaning and therefore overrides the express F.O.B. term" is wrong because § 1-303(e) says express terms prevail over course of performance; course of performance can supplement or qualify terms, but it cannot simply override a clear express term. "Permanent waiver" is wrong because a waiver affecting future performance is retractable until reliance occurs. "Course-of-performance evidence is never relevant when the contract contains a clear express term" is wrong because evidence is still relevant under § 1-303(f) to show waiver or modification. On exam day, spot "F.O.B." plus repeated contrary performance and immediately think: waiver is presumptively retractable absent detrimental reliance.
- How should the court rule on Buyer's objection?
Answer: Admit the evidence, because the court finds that the pretrial disclosure was sufficient to prevent unfair surprise.
Whenever you see a usage-of-trade issue, focus on two things: whether the usage can explain the parties' language, and whetherthe proponent gave sufficient notice. Under UCC §1-303, a usage of trade can give meaning to an express term — especially one like "promptly" that the contract never defines — so long as it doesn't contradict the express term's plain meaning. Here the trade usage explains what "promptly" means in this regional packaging market, so that is permissible.
The real fight is notice. Section 1-303(g) does not require notice before contract formation; it requires notice "that the court finds sufficient to prevent unfair surprise." Seller's pretrial disclosure came 10 days before trial, identified the particular usage, the transaction, andthe witnesses, andthe court specifically found Buyer had adequate opportunity to respond and would not be unfairly surprised. That satisfies the statutory standard. Admit the evidence.
Buyer's objections miss this framework. The idea that a usage of trade "may not be used to give meaning to an express term" is wrong because usage supplements explains ambiguous contract language unless it contradicts it. The claim that notice "must be given before the contract is formed" is also wrong — notice can come later if the court finds no unfair surprise. And there is no automatic rule that "no notice is required when the opposing party is engaged in the same trade"; even a sophisticated industry member is entitled to notice under the statute, though acourt could weigh that fact in assessing unfair surprise.
On the bar exam, when evidence of trade usage is challenged, don't ask whetherthe usage is relevant — ask whetherthe court could reasonably find the notice sufficient to prevent unfair surprise..
- Which of the following is the best response to Seller's argument?
Answer: The argument fails because one accepted delivery is not a repeated occasion of performance sufficient to create a course of performance.
Whenever you see a course-of-performance issue under UCC § 1-303, your first question should be: was there a repeated, accepted sequence of conduct? A course of performance is not created by a single event; it grows out of a party's knowing, unobjected-to acceptance over repeated occasions under the same contract.
Here, Buyer accepted the first 105-case delivery, but immediately rejected the extra five cases on the second delivery. That means Seller never established a "sequence of conduct" or repeated occasion of Buyer's acquiescence in 105 cases. One accepted delivery is simply not enough to give the term "requirements" a course-of-performance meaning of 105 cases, so Seller's argument fails.
The incorrect answers each miss this core point. The claim that course-of-performance evidence may not be used to interpret a contract silent on quantity is wrong as a matter of law: under § 1-303(d), course of performance may "supplement or qualify" agreement terms, including quantity, so the problem is not admissibility but insufficient evidence. The argument that Seller reasonably relied on Buyer's acquiescence confuses course of performance with reliance-based doctrines; Buyer's prompt rejection of the second shipment defeated any consistent pattern. Finally, the argument that the contract called for repeated monthly deliveries and Buyer accepted the first delivery ignores the statutory requirement of repeated occasions of acceptance—the contract's structure alone is not enough without Buyer's continued acquiescence.
Study tip: on bar-exam questions, watch for "one-time conduct" dressed up as a course of performance; remember a course requires a sequence, not a single event.
- Is Buyer's evidence of the prior course of dealing admissible?
Answer: Yes, because a course of dealing may explain or supplement a written agreement even when the writing is a complete and exclusive statement.
Whenever you see a written contract with a merger clause paired with a party trying to introduce prior behavior, you are testing the intersection of the parol evidence rule and UCC course of dealing. The key distinction is between prior agreements (which the merger clause blocks) and course of dealing (which the UCC explicitly protects). Here, the correct answer is that the course of dealing is admissible because § 2-202(a) allows a course of dealing to explain or supplement a written agreement—even one intended as a complete and exclusive statement. The merger clause only strips the power of consistent additional terms under subsection (b); it does not bar the interpretive tools in subsection (a). Because the contract is silent on shipping, the prior practice of Seller paying freight supplements that silence.
Now, consider the wrong answers. The claim that a merger clause applies only to prior oral agreements is false—it applies to prior written and oral agreements alike, but it cannot block a course of dealing. The answer that a merger clause excludes all extrinsic evidence is far too broad; it excludes prior agreements and additional terms, but not course of dealing, course of performance, or usage of trade. Finally, the answer stating that a course of dealing may not be used to add a term on which the contract is silent is directly contradicted by the statute, which explicitly allows it to supplement the terms.
Study tip: On the next-gen bar, when a question involves a merger clause and § 2-202, remember the exception: the clause kills prior agreements, but it never kills course of dealing, course of performance, or usage of trade for interpretive purposes.
- Which legal issue is most significant in determining whether the shipment conformed?
Answer: Whether the parties' course of dealing or the regional usage of trade should define 'first-quality lumber' for the current contract.
Whenever you see a contract dispute about the meaning of an undefined term, think about the UCC's hierarchy of interpretive evidence: express terms, course of performance, course of dealing, and usage of trade. Here, the key fight is between the parties' prior dealings (their course of dealing defined "first-quality lumber" as no knots over 1/4 inch) and the regional trade's general understanding (usage of trade allows knots up to 1/2 inch). That is exactly why the correct answer is that the most significant issue is whether the parties' course of dealing or the regional usage of trade should define the term. Course of dealing is prior conduct between the same parties, while usage of trade is broader industry practice, and courts reconcile them unless one is unreasonable or expressly negated.
The distractor saying regional usage is a course of performance is wrong: course of performance means behavior under the current contract, not regional custom. The suggestion that the contract is unenforceable for indefiniteness is also wrong — "first-quality lumber" has enough meaning to be supplied by extrinsic evidence. Finally, the furniture maker's rejection is not primarily a good-faith issue; good faith matters, but the real dispute is which interpretive source controls the term.
On exam day, when you see an undefined trade term, immediately map the evidence into UCC categories: course of performance, course of dealing, and usage of trade. That framework will keep you from confusing prior contracts with current conduct or industry custom.
- Which legal issue is most significant in resolving this dispute?
Answer: Whether the bakery's acceptance of the first four deliveries is a course of performance that gives meaning to the term 'approximately.'
Whenever you see an ambiguous contract term like "approximately," you're in UCC interpretation territory—specifically, how courts give meaning to vague terms. The key is to look at the parties' own conduct under the current contract before considering industry norms or external evidence.
Here, the mill's deliveries of 507, 512, 508, and 511 bags in the first four weeks—which the bakery accepted and paid for without complaint—form a course of performance. Under UCC § 2-202, this repeated, unobjected-to conduct is the strongest evidence of how the parties themselves interpreted "approximately 500." The bakery's sudden refusal at 545 bags contradicts its own prior acceptance of deliveries above 500, making the interpretive question of whether that course of performance defines the term the most significant legal issue.
The wrong answers each miss the mark. The implied-in-fact contract for a higher weekly quantity is a trap: the parties never manifested a new agreement to a different quantity—they were merely performing the original "approximately 500" contract, so no separate contract exists. The flour industry's customary tolerance mislabels the concept; that would be a usage of trade, not a course of dealing, which refers to prior transactions between these specific parties before this contract, not industry-wide practice. Finally, the implied duty of good faith is a background principle, but the dispute isn't about bad faith—it's about the meaning of a term, which the course of performance resolves directly.
Remember the hierarchy: express terms > course of performance > course of dealing > usage of trade. When a term is vague, look first to how the parties acted under the very contract in question.
- Who is likely to prevail on the meaning of 'truckload'?
Answer: Buyer, because the parties' course of performance controls over the usage of trade.
This question tests how the UCC resolves ambiguity in contract terms using extrinsic evidence. When a term like "truckload" is undefined, you should look to the parties' actual conduct and trade usage, and then apply the UCC's hierarchy. Under § 1-303, a course of performance is relevant to give meaning to specific terms, and the Official Comment states that as between a course of performance and a usage of trade, the course of performance controls.
Here, the parties had six repeated monthly deliveries of 8 cubic yards, and Buyer accepted and paid for each delivery. That conduct establishes a course of performance that gives "truckload" its particular meaning. Seller's later 10-cubic-yard delivery did not match that meaning, so Buyer may reject the extra 2 cubic yards.
The wrong answers miss the hierarchy. The choice saying the regional usage of trade binds Buyer "even if Buyer was unaware of it" ignores that course of performance controls over trade usage. The choice saying a course of performance "may not be used to contradict the express term" mischaracterizes the issue: "one truckload per month" is ambiguous, so the course of performance is used to ascertain its meaning, not contradict it. The final choice, that usage of trade is admissible only when consistent with a course of dealing, misstates the law—course of dealing is a separate source of meaning, not a precondition to trade usage.
Study tip: in UCC interpretation questions, remember the priority—express terms, then course of performance, course of dealing, and usage of trade, with course of performance beating usage of trade.
- Which legal issue is most significant in determining whether the fee applies?
Answer: Whether the parties' prior contracts and paid invoices are a course of dealing that supplements the new contract.
This question tests how prior conduct between the same parties fills gaps in a later contract. Whenever a written contract is silent on a term, ask whether the parties' own history establishes a common basis of understanding before you turn to industry custom or later conduct.
Here, the new contract says only "Price per order: $500" and is silent on restocking fees. The supplier's prior invoices separately stated a restocking fee, and the contractor paid it twice. Under UCC gap-filling principles, a course of dealing—a sequence of previous conduct between the parties that is fairly regarded as establishing a common basis of understanding—can supplement or explain the terms of a later contract. That prior pattern is the most significant issue because it directly connects these parties' own past agreement to the silent term.
The supplier's first restocking-fee invoice under the new contract is not a course of performance; course of performance is conduct occurring after the contract begins and repeated, whereas the supplier's single invoice is a unilateral assertion. The contractor's reduction of an order is not the controlling legal issue; whether a breach occurred depends on the contract's terms, and the fee question is a gap-filling question, not a damages question. Finally, an industry restocking-fee practice is a usage of trade, not a course of dealing between these parties; it might matter, but the parties' own prior dealings carry more weight.
Study tip: when a contract is silent, follow the UCC hierarchy—express terms, then course of performance, then course of dealing, then usage of trade.
- Which legal issue is most significant in determining whether the rejection was proper?
Answer: Whether the industrial bearing trade's understanding of 'Grade A' is a usage of trade that supplements the contract.
When you see an undefined trade term in a sales contract, ask what sources of meaning the UCC allows to fill the gap: express terms, course of dealing, and usage of trade. Here, "Grade A" was not defined, and the parties had never dealt before, so course of dealing drops out. The critical question is whether the industrial trade's consistent treatment of "Grade A" as requiring a specified finish and tolerance is a usage of trade. Under the UCC, an established usage of trade supplements and explains contract terms, and it applies when a party is engaged in the trade or has reason to know it. So the distributor's rejection was proper if the bearings failed that standard; the manufacturer's unawareness is not automatically a defense, because the trade usage supplies the term objectively. The mutual-mistake argument is a trap: a trade usage is not an erroneous assumption by both parties making the contract voidable; it is an objective interpretive backdrop to the deal. The no-prior-dealings point misses the issue too: course of dealing requires a sequence of previous conduct between the same parties, and none exists, but that does not defeat usage of trade — an industry custom can bind even in a first transaction. Finally, the rejection of delivered bearings as nonconforming is not an anticipatory repudiation; that doctrine concerns a party's pre-performance announcement that it will not perform. Practical takeaway: when an undefined term is disputed, ask whether an established trade usage gives it content — that is usually the decisive issue.
- Which legal issue is most significant in resolving the dispute?
Answer: Whether the parties' course of performance waived the contract's written-change-order requirement.
This question tests contract modification and the effect of a written "no oral changes" clause. Whenever a contract says changes must be in writing, the key follow-up is whether the parties' later conduct has waived that requirement—not whether the modification was otherwise valid.
Here, the homeowner made oral change requests, the company performed them, invoiced the extra work, and the homeowner paid. That repeated pattern is course of performance: conduct between the parties during the current contract. Under UCC § 2-209, a written modification clause is enforceable, but a party can waive it through course of performance. So the most significant issue is whether the parties' course of performance waived the contract's written-change-order requirement. If yes, the fourth oral request may also be enforceable despite the writing clause.
The wrong choices each mislabel the legal concept. Whether the company's invoices established a usage of trade is off—usage of trade is an industry-wide practice, not one company's invoices. Whether the oral requests were offers to modify accepted by performing describes an ordinary modification, but it fails to address the writing clause, which is the real obstacle. Whether the homeowner's payment was a course of dealing is also wrong: course of dealing refers to prior transactions between the same parties before this contract, not their conduct during it.
Study tip: distinguish course of performance (this contract), course of dealing (earlier contracts), and usage of trade (industry custom). When a writing requirement appears, ask whether later conduct waived it.
