Cost Accounting Quiz: Cost Categories For Decisions
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Cost Categories For DecisionsQuestion 1 of 7

TechCorp is considering whether to accept a special order for 1,000 units at $45 per unit. The company's normal selling price is $60 per unit. Current production is 8,000 units, and maximum capacity is 10,000 units. Regular variable costs are $30 per unit, but the special order would require additional packaging costing $3 per unit. The production manager's salary of $80,000 annually is allocated to products at $10 per unit based on normal capacity. TechCorp spent $25,000 last year developing the product design that would be used for this special order.

When evaluating this special order decision, which cost should be treated as a relevant cost?

The $33 per unit total variable cost including special packaging for the order
The $40 per unit full cost including allocated production manager salary
The $25,000 product development cost that enables this special order
The $30 per unit regular variable cost since packaging is extraordinary
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Cost Accounting Quiz

Cost Accounting Quiz: Cost Categories For Decisions

Practice Cost Categories For Decisions in Cost Accounting 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 Cost Categories For Decisions, giving you a quick way to practice the rules, question types, and explanations that matter most for Cost Accounting.

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

TechCorp is considering whether to accept a special order for 1,000 units at $45 per unit. The company's normal selling price is $60 per unit. Current production is 8,000 units, and maximum capacity is 10,000 units. Regular variable costs are $30 per unit, but the special order would require additional packaging costing $3 per unit. The production manager's salary of $80,000 annually is allocated to products at $10 per unit based on normal capacity. TechCorp spent $25,000 last year developing the product design that would be used for this special order.

When evaluating this special order decision, which cost should be treated as a relevant cost?

  1. The $33 per unit total variable cost including special packaging for the order (correct answer)
  2. The $40 per unit full cost including allocated production manager salary
  3. The $25,000 product development cost that enables this special order
  4. The $30 per unit regular variable cost since packaging is extraordinary
Explanation: Relevant costs are future costs that differ between alternatives. The 33perunit(33 per unit (30 regular variable + $3 special packaging) represents the incremental cost that will be incurred if the order is accepted. Choice B incorrectly includes allocated fixed costs that won't change with the decision. Choice C incorrectly includes sunk costs already spent. Choice D incorrectly excludes the additional packaging cost that is required for this decision.

Question 2

RetailCorp currently operates two product lines: Alpha and Beta. Alpha generates $200,000 annual revenue with variable costs of $120,000 and direct fixed costs of $60,000. Beta generates $150,000 revenue with variable costs of $80,000 and direct fixed costs of $40,000. Common fixed costs of $50,000 are allocated equally between the lines. Management is considering dropping Alpha and using its shelf space for an expanded candy section that would generate $30,000 additional contribution margin annually.

If RetailCorp drops product line Alpha, what is the relevant opportunity cost of this decision?

  1. $30,000 representing the foregone contribution margin from expanded candy sales
  2. $20,000 representing Alpha's current contribution margin less allocated common costs
  3. $80,000 representing Alpha's current contribution margin before any other considerations (correct answer)
  4. $50,000 representing the net benefit after considering both Alpha's margin and candy expansion
Explanation: Opportunity cost represents the benefit foregone from the next best alternative. By dropping Alpha, the company foregoes Alpha's contribution margin of 80,000(80,000 (200,000 - $120,000). The candy expansion represents a benefit of the decision, not an opportunity cost. Choice A confuses the benefit with the opportunity cost. Choice B incorrectly deducts allocated common costs that will continue regardless. Choice D incorrectly nets the opportunity cost against the decision's benefits.

Question 3

BuildCorp purchased specialized equipment two years ago for $100,000 with an expected 10-year life. The equipment has a current book value of $80,000 and could be sold today for $45,000. The company is considering a project that would require this equipment plus an additional $20,000 investment in modifications. Alternatively, BuildCorp could sell the equipment and lease similar equipment for $8,000 annually for the project duration.

For the make-or-lease equipment decision, how should the original equipment be evaluated?

  1. Include $80,000 as a sunk cost that favors the leasing alternative
  2. Include $45,000 as an opportunity cost of using the owned equipment (correct answer)
  3. Include $100,000 as the true economic cost of the owned equipment
  4. Include $65,000 representing the net book value less estimated disposal costs
Explanation: The relevant cost of using owned equipment is its opportunity cost - what could be obtained by selling it ($45,000). This represents the economic sacrifice of using rather than selling the equipment. Choice A incorrectly treats book value as relevant when book value represents a sunk cost. Choice C uses historical cost, which is also sunk. Choice D creates a fictional disposal cost and uses irrelevant book value.

Question 4

PlasticCorp produces containers using Machine A, purchased three years ago for $150,000. Machine A has accumulated depreciation of $90,000 and could be sold for $35,000. The company is considering replacing it with Machine B costing $120,000. Machine A has annual operating costs of $45,000 while Machine B would cost $28,000 annually. Both machines would be used for three more years, after which Machine A would have no value and Machine B would be worth $20,000.

For the machine replacement decision, what represents the relevant cost of keeping Machine A for three years?

  1. $135,000 representing operating costs plus the foregone sale proceeds
  2. $180,000 including book value plus operating costs over three years
  3. $95,000 representing book value plus foregone proceeds from immediate sale
  4. $170,000 representing operating costs plus opportunity cost of foregone sale proceeds (correct answer)
Explanation: When analyzing machine replacement decisions, you need to focus on relevant costs—those that will differ between alternatives. The key insight is identifying what costs you'll actually incur by keeping the existing machine versus replacing it. For keeping Machine A, the relevant costs include: the three years of operating costs ($45,000 × 3 = 135,000)plustheopportunitycostofnotsellingitimmediately(135,000) plus the opportunity cost of not selling it immediately (35,000). This totals $170,000. The opportunity cost matters because by keeping Machine A, you're giving up the $35,000 you could receive today from selling it. Let's examine why the other options miss the mark: Option A ($135,000) correctly includes operating costs and foregone sale proceeds but calculates the foregone proceeds incorrectly—it should be the full $35,000 sale value, not some other amount. Option B (180,000)incorrectlyincludesthebookvalue(180,000) incorrectly includes the book value (60,000). Book value represents a sunk cost from past depreciation and isn't relevant to future decisions. You can't recover this amount regardless of your choice. Option C ($95,000) focuses only on book value and opportunity cost while completely ignoring the three years of operating costs—the largest component of keeping the machine. Option D correctly captures both the future operating costs you'll pay and the immediate sale proceeds you're forgoing by not selling today. Study tip: In replacement decisions, always exclude sunk costs (like book value) and include opportunity costs (like foregone sale proceeds). Focus on what cash flows will actually differ between your alternatives.

Question 5

ServiceCorp is evaluating whether to outsource its payroll processing. Current internal costs include: payroll clerk salary $45,000, software license $8,000 annually, allocated office rent $6,000, and allocated IT support $4,000. An outside vendor quotes $50,000 annually. If outsourced, the payroll clerk would be reassigned to customer service where she could generate additional revenue of $15,000 annually. The software license has two years remaining and cannot be cancelled.

Which costs should be classified as relevant for the outsourcing decision?

  1. Vendor cost $50,000, avoided clerk salary $45,000, and foregone customer service revenue $15,000
  2. Vendor cost $50,000, total current internal costs $63,000, and additional revenue opportunity $15,000
  3. Vendor cost $50,000, avoidable internal costs $45,000, and opportunity cost $15,000 of not reassigning clerk (correct answer)
  4. Vendor cost $50,000, clerk salary $45,000, software license $8,000, and potential additional revenue $15,000
Explanation: Relevant costs are future costs that differ between alternatives. The vendor cost (50,000)isanewcostifoutsourcingoccurs.Theclerksalary(50,000) is a new cost if outsourcing occurs. The clerk salary (45,000) is avoidable if outsourced. The opportunity cost ($15,000) represents foregone benefits of not reassigning the clerk to customer service. Allocated costs (rent, IT support) continue regardless and aren't relevant. The software license is a sunk cost that continues either way. Choice A incorrectly describes the revenue as foregone rather than an opportunity from reassignment. Choice B includes non-avoidable allocated costs. Choice D includes the non-cancellable software license.

Question 6

TechManufacturing invested $200,000 in R&D for product Alpha two years ago and spent an additional $50,000 last month on market research. Alpha could be launched with an additional $80,000 investment in equipment and $30,000 in initial marketing. Alternatively, the company could abandon Alpha and invest $90,000 to launch product Beta, which uses different technology. The market research shows Alpha would generate $40,000 annual profit while Beta would generate $35,000 annual profit, both for five years.

When choosing between launching Alpha or Beta, which statement correctly identifies the relevant costs?

  1. Alpha's relevant cost is $360,000 including all prior investments and future requirements for proper comparison
  2. The $250,000 in prior investments should be allocated between Alpha and Beta based on their profit potential
  3. The $50,000 market research should be included for Alpha since it specifically studied Alpha's market potential
  4. Alpha requires $110,000 additional investment while Beta requires $90,000, with all prior costs being irrelevant (correct answer)
Explanation: When analyzing investment decisions, you need to distinguish between relevant and irrelevant costs. Relevant costs are future costs that differ between alternatives, while sunk costs (money already spent) should never influence your decision since they can't be recovered regardless of what you choose. The correct approach focuses only on additional investments needed going forward. For Alpha, you'd need $80,000 for equipment plus $30,000 for marketing, totaling $110,000. For Beta, you'd need $90,000. These are the only costs that matter for your decision because they're the only ones you can still control. Answer A incorrectly includes the $200,000 R&D and $50,000 market research as relevant costs. These are classic sunk costs—money already spent that won't change regardless of which product you launch. Including sunk costs inflates the apparent cost of continuing with Alpha and can lead to poor decisions. Answer B suggests allocating prior investments between the options, but this allocation approach is fundamentally flawed. Sunk costs remain irrelevant regardless of how you divide them up. Answer C specifically calls the $50,000 market research relevant to Alpha. While this research may have provided useful information, the money is already spent. The research findings might influence your decision, but the cost itself shouldn't. Remember this key principle: ignore all sunk costs in decision-making and focus only on incremental costs and benefits going forward. This prevents the "throwing good money after bad" trap that catches many managers.

Question 7

Manufacturing Inc. operates at 75% of capacity producing 15,000 units monthly. The company receives an offer to sell 3,000 additional units to a new customer. Current costs per unit are: direct materials $12, direct labor $8, variable overhead $5, and fixed overhead $10 (based on normal capacity of 20,000 units). To accommodate this order, the company would need to lease additional equipment for $6,000 per month and hire a supervisor for $4,000 per month.

What represents the incremental cost per unit for the special order decision?

  1. $25 per unit representing only the current variable manufacturing costs
  2. $28.33 per unit including current variable costs plus additional fixed costs (correct answer)
  3. $35 per unit including all current manufacturing costs allocated to the order
  4. $31.67 per unit including variable costs plus incremental supervisor costs only
Explanation: Incremental costs include all costs that change due to the decision. Variable costs are 25perunit(25 per unit (12 + $8 + $5). Additional fixed costs are 10,000monthly(10,000 monthly (6,000 equipment + $4,000 supervisor) ÷ 3,000 units = $3.33 per unit. Total incremental cost is $28.33 per unit. Choice A omits additional fixed costs. Choice C includes existing fixed overhead that won't change. Choice D omits the equipment lease cost.