AP Microeconomics Quiz: Types Of Profit
20 questions · exam conditions
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Types Of ProfitQuestion 1 of 20

Based on the firm's cost and revenue information, is the firm earning normal profit? A home cleaning service earns total revenue of $75,000. Its explicit costs are $40,000 for supplies and hired help and $15,000 for advertising and insurance, for total explicit costs of $55,000. The owner gives up $18,000 in wages from another job and uses a vehicle that could be leased out for $2,000 per year (implicit costs total $20,000).

Yes; economic profit is $20,000, so the firm earns normal profit.
No; economic profit is $0, so the firm earns less than normal profit.
Yes; accounting profit is $0, so the firm earns normal profit.
No; economic profit is $-20,000, so the firm earns less than normal profit.
Yes; economic profit is $0, so the firm earns normal profit.
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AP Microeconomics Quiz

AP Microeconomics Quiz: Types Of Profit

Practice Types Of Profit in AP Microeconomics 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 Types Of Profit, giving you a quick way to practice the rules, question types, and explanations that matter most for AP Microeconomics.

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

Based on the firm's cost and revenue information, is the firm earning normal profit? A home cleaning service earns total revenue of $75,000. Its explicit costs are $40,000 for supplies and hired help and $15,000 for advertising and insurance, for total explicit costs of $55,000. The owner gives up $18,000 in wages from another job and uses a vehicle that could be leased out for $2,000 per year (implicit costs total $20,000).

  1. Yes; economic profit is $20,000, so the firm earns normal profit.
  2. No; economic profit is $0, so the firm earns less than normal profit.
  3. Yes; accounting profit is $0, so the firm earns normal profit.
  4. No; economic profit is $-20,000, so the firm earns less than normal profit.
  5. Yes; economic profit is $0, so the firm earns normal profit. (correct answer)

Explanation: This question tests your understanding of types of profit in microeconomics. Accounting profit is accounting profit=total revenue−explicit costs\text{accounting profit} = \text{total revenue} - \text{explicit costs}, economic profit is economic profit=total revenue−explicit costs−implicit costs\text{economic profit} = \text{total revenue} - \text{explicit costs} - \text{implicit costs}, and normal profit occurs when economic profit is zero. In this scenario, the home cleaning service has total revenue of $75,000, explicit costs of $55,000, and implicit costs of $20,000. Therefore, economic profit is $0, meaning the firm earns normal profit, which matches choice E. A common misconception is ignoring implicit costs, which would lead to calculating only accounting profit of $20,000 instead of economic profit. To solve similar problems, remember that economic profit equals $ \text{economic profit} = \text{total revenue} - \text{explicit costs} - \text{implicit costs} $. This formula helps determine if a firm is earning above, at, or below normal profit.

Question 2

Based on the firm's cost and revenue information, is the firm earning normal profit? A firm earns total revenue of $1,500 per week. Explicit costs are $900 for wages and $300 for materials. The owner gives up a $200-per-week wage elsewhere and uses $10,000 of personal funds that could earn $100 per week in interest elsewhere.

  1. Yes, because economic profit is $0 per week. (correct answer)
  2. Yes, because accounting profit is $0 per week.
  3. No, because economic profit is $300 per week.
  4. No, because normal profit occurs only when revenue is $0.
  5. No, because economic profit is $-300 per week.

Explanation: This question tests your understanding of types of profit, specifically the concept of normal profit. Accounting profit equals total revenue minus explicit costs, economic profit equals total revenue minus both explicit and implicit costs, and normal profit occurs when economic profit equals zero. The firm has total revenue of $1,500, explicit costs of 1,200(1,200 (900 wages + $300 materials), and implicit costs of 300(300 (200 forgone wage + $100 forgone interest). Economic profit = $1,500 - $1,200 - $300 = $0, which means the firm is earning exactly normal profit, confirming answer A is correct. A common misconception is thinking normal profit means the business is failing, when it actually means earning enough to cover all opportunity costs. To determine normal profit, calculate economic profit using: economic profit = TR - explicit costs - implicit costs; if zero, the firm earns normal profit.

Question 3

Based on the firm's cost and revenue information, what is the firm's economic profit? A small retailer has total revenue of $300,000. Its explicit costs are $240,000. The owner forgoes a $45,000 salary elsewhere and uses a warehouse he owns that could be rented out for $10,000 per year.

  1. $60,000 per year
  2. $5,000 per year (correct answer)
  3. $-5,000 per year
  4. $-55,000 per year
  5. $55,000 per year

Explanation: This problem requires calculating economic profit for a small retailer, demonstrating the three types of profit. Accounting profit includes only explicit costs, economic profit subtracts both explicit and implicit costs from revenue, and normal profit occurs when economic profit equals zero. The retailer has total revenue of $300,000, explicit costs of $240,000, and implicit costs of 55,000(55,000 (45,000 forgone salary + $10,000 forgone warehouse rent). Economic profit = $300,000 - $240,000 - $55,000 = 5,000,confirminganswerBiscorrect.Manystudentsmistakenlycalculateonlyaccountingprofit(5,000, confirming answer B is correct. Many students mistakenly calculate only accounting profit (60,000) by overlooking implicit costs, thinking the business is more profitable than it truly is. The transferable strategy remains: economic profit = total revenue - explicit costs - implicit costs. This formula ensures you always account for what the owner sacrifices by choosing this business over alternatives.

Question 4

Based on the firm's cost and revenue information, is the firm earning normal profit? A photographer earns total revenue of $70,000 and has explicit costs of $52,000. The photographer gave up a $12,000 job and uses $60,000 of personal funds that could have earned $6,000 in interest elsewhere.

  1. Yes; economic profit is $18,000, so the firm earns normal profit.
  2. Yes; economic profit is $0, so the firm earns normal profit. (correct answer)
  3. No; economic profit is $0, so the firm does not earn normal profit.
  4. No; revenue is not zero, so the firm cannot be earning normal profit.
  5. No; economic profit is $-18,000, so the firm does not earn normal profit.

Explanation: This question asks whether a photographer is earning normal profit, testing understanding of the three types of profit. Accounting profit considers only explicit costs, economic profit includes both explicit and implicit costs, and normal profit specifically occurs when economic profit equals zero. The photographer has total revenue of $70,000, explicit costs of $52,000, and implicit costs of 18,000(18,000 (12,000 forgone job + $6,000 forgone interest). Economic profit = $70,000 - $52,000 - $18,000 = $0, which means the firm is earning exactly normal profit, making answer B correct. A common error is thinking normal profit means the business isn't successful—in fact, it means the photographer is doing exactly as well as their next-best alternative. The key insight: when economic profit = TR - explicit costs - implicit costs = 0, the firm earns normal profit. This indicates efficient resource allocation where the business matches but doesn't exceed opportunity costs.

Question 5

Based on the firm's cost and revenue information, which statement correctly compares accounting and economic profit? A bakery earns total revenue of $90,000. Its explicit costs are $70,000. The owner also forgoes a $15,000 salary elsewhere and uses a building she owns that could be rented out for $10,000 per year.

  1. Accounting profit is $20,000 and economic profit is $-5,000. (correct answer)
  2. Accounting profit is $-5,000 and economic profit is $20,000.
  3. Accounting profit is $20,000 and economic profit is $20,000.
  4. Accounting profit is $5,000 and economic profit is $-5,000.
  5. Accounting profit is $0 and economic profit is $0.

Explanation: This question requires you to calculate and compare types of profit for a bakery. Accounting profit equals total revenue minus explicit costs only, while economic profit equals total revenue minus both explicit and implicit costs, and normal profit exists when economic profit is zero. The bakery has total revenue of $90,000, explicit costs of $70,000, and implicit costs of 25,000(25,000 (15,000 forgone salary + $10,000 forgone rent). Accounting profit = $90,000 - $70,000 = $20,000, and economic profit = $90,000 - $70,000 - 25,000=−25,000 = -5,000, confirming answer A is correct. Many students mistakenly think negative economic profit means the business is failing, but it simply means the owner would earn more in their next-best alternative. The key strategy is to calculate both profits separately: first accounting profit (TR - explicit costs), then economic profit (TR - explicit costs - implicit costs). This systematic approach prevents confusion between the two profit measures.

Question 6

Based on the firm's cost and revenue information, what is the firm's economic profit? A sole proprietor has total revenue of $200,000. The firm’s explicit (accounting) costs are $140,000 (wages, rent, materials, utilities). The owner gave up a $30,000 salary from another job and uses $10,000 of personal savings that could have earned $1,000 in interest elsewhere.

  1. $60,000 per year
  2. $29,000 per year (correct answer)
  3. $30,000 per year
  4. $31,000 per year
  5. $-29,000 per year

Explanation: This question tests your understanding of types of profit, specifically how to calculate economic profit. Accounting profit considers only explicit costs (money actually paid out), while economic profit includes both explicit and implicit costs (opportunity costs), and normal profit occurs when economic profit equals zero. The firm has total revenue of $200,000, explicit costs of $140,000, and implicit costs of 31,000(31,000 (30,000 forgone salary + $1,000 forgone interest). To find economic profit, we calculate: $200,000 - $140,000 - $31,000 = 29,000,makinganswerBcorrect.Acommonmisconceptionisignoringimplicitcostsandcalculatingonlyaccountingprofit(29,000, making answer B correct. A common misconception is ignoring implicit costs and calculating only accounting profit (200,000 - $140,000 = $60,000). Remember the transferable strategy: economic profit = total revenue - explicit costs - implicit costs. This formula ensures you always account for all opportunity costs when evaluating true profitability.

Question 7

Based on the firm's cost and revenue information, what is the firm's economic profit? A tutoring service earns total revenue of $48,000 and has explicit costs of $30,000. The owner forgoes $12,000 in wages from the next-best job and uses a spare room that could be rented out for $3,000 per year.

  1. $18,000 per year
  2. $3,000 per year (correct answer)
  3. $-3,000 per year
  4. $33,000 per year
  5. $-18,000 per year

Explanation: This problem requires calculating economic profit for a tutoring service, demonstrating the three types of profit in action. Accounting profit includes only explicit costs, economic profit subtracts both explicit and implicit costs, and normal profit exists when economic profit equals zero. The tutoring service has total revenue of $48,000, explicit costs of $30,000, and implicit costs of 15,000(15,000 (12,000 forgone wages + $3,000 forgone rent). Economic profit = $48,000 - $30,000 - $15,000 = 3,000,confirminganswerBiscorrect.Manystudentsmistakenlycalculateonlyaccountingprofit(3,000, confirming answer B is correct. Many students mistakenly calculate only accounting profit (18,000) by ignoring the opportunity costs of the owner's time and space. The reliable formula for economic profit = total revenue - explicit costs - implicit costs ensures you capture the true profitability above alternative uses. This calculation reveals whether the business generates value beyond what the resources could earn elsewhere.

Question 8

Based on the firm's cost and revenue information, which statement correctly compares accounting and economic profit? A small gym has total revenue of $160,000 and explicit costs of $120,000. The owner also gives up a $25,000 salary elsewhere and uses a storefront he owns that could earn $10,000 per year in rent.

  1. Accounting profit is $40,000 and economic profit is $5,000. (correct answer)
  2. Accounting profit is $5,000 and economic profit is $40,000.
  3. Accounting profit is $40,000 and economic profit is $40,000.
  4. Accounting profit is $-5,000 and economic profit is $40,000.
  5. Accounting profit is $0 and economic profit is $0.

Explanation: This question tests your ability to calculate and distinguish between types of profit for a small gym. Accounting profit equals revenue minus explicit costs only, economic profit equals revenue minus all costs (explicit plus implicit), and normal profit occurs when economic profit is zero. The gym has total revenue of $160,000, explicit costs of $120,000, and implicit costs of 35,000(35,000 (25,000 forgone salary + $10,000 forgone rent). Accounting profit = $160,000 - $120,000 = $40,000, and economic profit = $160,000 - $120,000 - $35,000 = $5,000, confirming answer A is correct. Students often mistakenly ignore implicit costs, thinking the $40,000 accounting profit represents true profitability. The key strategy for comparing profits: first calculate accounting profit (TR - explicit costs), then economic profit (TR - explicit costs - implicit costs). This two-step approach clearly shows how opportunity costs reduce the firm's true economic gain.

Question 9

Based on the firm's cost and revenue information, is the firm earning normal profit? Total revenue is $150,000 and explicit costs are $110,000. The owner's implicit costs total $30,000 (forgone salary and foregone interest on owner funds).

  1. Yes; economic profit is $40,000, so the firm is earning normal profit.
  2. No; economic profit is $10,000, so the firm is earning more than normal profit. (correct answer)
  3. Yes; accounting profit is $10,000, so the firm is earning normal profit.
  4. No; economic profit is $0, so the firm is earning less than normal profit.
  5. Yes; normal profit occurs only when explicit costs are $0.

Explanation: This question examines your understanding of types of profit and the normal profit concept. Accounting profit equals revenue minus explicit costs, economic profit equals revenue minus all costs, and normal profit occurs when economic profit is zero. The firm has total revenue of $150,000, explicit costs of $110,000, and implicit costs of $30,000. Economic profit = $$150,000 - $110,000 - $30,000 = $10,000$, which is positive, meaning the firm earns more than normal profit, making choice B correct. Students often confuse normal profit with accounting profit or think any positive profit means normal profit. The key insight is that normal profit occurs only when economic profit equals zero. When economic profit is positive, the firm earns above-normal profit; when negative, it earns below-normal profit.

Question 10

Based on the firm's cost and revenue information, which statement correctly compares accounting and economic profit? A firm has total revenue of $120,000 and explicit costs of $90,000. The owner could earn $25,000 working elsewhere and uses a building the owner owns that could be rented to another business for $10,000 per year.

  1. Accounting profit is $30,000 and economic profit is $-5,000. (correct answer)
  2. Accounting profit is $-5,000 and economic profit is $30,000.
  3. Accounting profit is $30,000 and economic profit is $5,000.
  4. Accounting profit is $0 and economic profit is $-5,000.
  5. Accounting profit is $30,000 and economic profit is $65,000.

Explanation: This question requires you to calculate and compare types of profit. Accounting profit considers only explicit costs while economic profit includes both explicit and implicit costs, and normal profit exists when economic profit equals zero. The firm has total revenue of $120,000, explicit costs of $90,000, and implicit costs of $35,000 ($25,000 forgone salary plus $10,000 forgone rent). Accounting profit = $120,000 - $90,000 = $30,000, and economic profit = $120,000 - $90,000 - $35,000 = $-5,000, making choice A correct. Students often confuse the two profit types or forget to include all implicit costs when calculating economic profit. The key strategy is to calculate accounting profit first (TR - explicit costs), then subtract implicit costs to find economic profit. A negative economic profit means the firm is earning less than it could in its next best alternative.

Question 11

Based on the firm's cost and revenue information, is the firm earning normal profit? A tutoring business has total revenue of $90,000. Its explicit costs are $50,000 for tutor wages and supplies and $10,000 for office rent, for total explicit costs of $60,000. The owner gives up a $25,000 salary elsewhere and uses a room in their home that could be rented out for $5,000 per year (implicit costs total $30,000).

  1. Yes; economic profit is $30,000, so the firm earns normal profit.
  2. Yes; accounting profit is $0, so the firm earns normal profit.
  3. No; economic profit is $-30,000, so the firm earns less than normal profit.
  4. No; economic profit is $0, so the firm earns less than normal profit.
  5. Yes; economic profit is $0, so the firm earns normal profit. (correct answer)

Explanation: This question tests your understanding of types of profit in microeconomics. Accounting profit is total revenue minus explicit costs, economic profit is total revenue minus both explicit and implicit costs, and normal profit occurs when economic profit is zero. In this scenario, the tutoring business has total revenue of $90,000, explicit costs of $60,000, and implicit costs of $30,000. Therefore, economic profit is $0, meaning the firm earns normal profit, which matches choice E. A common misconception is ignoring implicit costs, which would lead to calculating only accounting profit of $30,000 instead of economic profit. To solve similar problems, remember that economic profit equals total revenue minus explicit costs minus implicit costs. This formula helps determine if a firm is earning above, at, or below normal profit.

Question 12

A small printing shop earns total revenue of $250,000. Its explicit costs are $170,000 (paper, ink, wages, and rent paid). The owner forgoes a $60,000 salary from another job and uses machinery she owns that she could lease to another business for $25,000 per year. Based on the firm's cost and revenue information, which statement correctly compares accounting and economic profit?

  1. Accounting profit is $85,000 higher than economic profit. (correct answer)
  2. Accounting profit is $0 because implicit costs equal revenue.
  3. Economic profit is $80,000, while accounting profit is $55,000.
  4. Accounting profit equals economic profit because leasing is an explicit cost.
  5. Economic profit is $85,000 higher than accounting profit.

Explanation: This question tests the skill of identifying types of profit in AP Microeconomics. Accounting profit is total revenue minus explicit costs, economic profit is total revenue minus both explicit and implicit costs, and normal profit occurs when economic profit is zero. The printing shop has total revenue of $250,000, explicit costs of $170,000, and implicit costs of $60,000 in forgone salary and $25,000 in forgone leasing income. Accounting profit is $80,000 and economic profit is $-5,000, so accounting profit is $85,000 higher than economic profit, justifying choice A as the correct answer. A common misconception is to ignore implicit costs, leading to the belief that accounting and economic profits are equal. The transferable strategy is to calculate economic profit as total revenue minus explicit costs minus implicit costs. This approach helps in comparing the two types of profit accurately.

Question 13

A tutoring center earns total revenue of $75,000. Its explicit costs are $50,000 (advertising, supplies, and payments to part-time tutors). The owner works in the business and could earn $22,000 elsewhere. The owner also uses a spare room in her home; she could rent that room to a tenant for $3,000 per year. Based on the firm's cost and revenue information, is the firm earning normal profit?

  1. Yes; accounting profit is $0, so normal profit is earned.
  2. Yes; economic profit is $0, so normal profit is earned. (correct answer)
  3. No; economic profit is $25,000, so above-normal profit is earned.
  4. No; revenue is positive, so normal profit cannot occur.
  5. No; economic profit is $-25,000, so below-normal profit is earned.

Explanation: This question tests the skill of identifying types of profit in AP Microeconomics. Accounting profit is total revenue minus explicit costs, economic profit is total revenue minus both explicit and implicit costs, and normal profit occurs when economic profit is zero. The tutoring center has total revenue of $75,000, explicit costs of $50,000, and implicit costs of $22,000 in forgone salary and $3,000 in forgone rental income. The economic profit is 75,000−50,000−22,000−3,000=075,000 - 50,000 - 22,000 - 3,000 = 0, justifying choice B that the firm is earning normal profit. A common misconception is to ignore implicit costs, leading to using accounting profit of $25,000 to incorrectly conclude above-normal profit. The transferable strategy is to calculate economic profit as total revenue minus explicit costs minus implicit costs. This method determines if the firm earns normal, above, or below normal profit.

Question 14

Based on the firm's cost and revenue information, what is the firm's economic profit? A bookstore has total revenue of \95{,}000.Itsexplicitcostsare. Its explicit costs are $45{,}000forinventory,for inventory,$20{,}000forwages,andfor wages, and$10{,}000forrent.Theownercouldearnfor rent. The owner could earn$12{,}000workingforanotherretailer,andtheownerinvestedworking for another retailer, and the owner invested$40{,}000$ that could earn 5 percent annually in a money market fund.

  1. \20{,}000$ per year
  2. \8{,}000$ per year
  3. \6{,}000$ per year (correct answer)
  4. -\6{,}000$ per year
  5. -\8{,}000$ per year

Explanation: This problem requires calculating economic profit to understand the three types of profit businesses can earn. Accounting profit considers only explicit costs, economic profit includes both explicit and implicit opportunity costs, and normal profit occurs when economic profit equals zero. The bookstore has revenue of $95,000, explicit costs of 75,000(75,000 (45,000 + $20,000 + $10,000), and implicit costs of 14,000(14,000 (12,000 forgone salary + $2,000 forgone interest on $40,000 at 5%). Economic profit = $95,000 - $75,000 - $14,000 = $6,000. A common mistake is miscalculating the interest on invested funds—remember to multiply the principal by the interest rate. The reliable strategy for finding economic profit is: total revenue minus all explicit costs minus all implicit costs, ensuring you capture every opportunity cost.

Question 15

Based on the firm's cost and revenue information, what is the firm's economic profit? A coffee cart has total revenue of \50{,}000.Itsexplicitcostsare. Its explicit costs are $15{,}000forcoffeeandpastries,for coffee and pastries,$10{,}000forwagestoapart−timeworker,andfor wages to a part-time worker, and$5{,}000forpermitsandinsurance.Theownercouldearnfor permits and insurance. The owner could earn$18{,}000workingelsewhere.Theowneralsousesaworking elsewhere. The owner also uses a$40{,}000cartthatsheowns;shecouldrentoutthecartforcart that she owns; she could rent out the cart for$4{,}000$ per year.

  1. \2{,}000$ per year
  2. \20{,}000$ per year
  3. \38{,}000$ per year
  4. -\2{,}000$ per year (correct answer)
  5. -\20{,}000$ per year

Explanation: This problem requires calculating economic profit, which is one of the three types of profit used to evaluate business performance. Accounting profit subtracts only explicit costs from revenue, economic profit subtracts both explicit and implicit costs, and normal profit occurs when economic profit equals zero. The coffee cart generates $50,000 in revenue with explicit costs of 30,000(30,000 (15,000 + $10,000 + $5,000) and implicit costs of 22,000(22,000 (18,000 forgone salary + $4,000 forgone cart rental). Economic profit = $50,000 - $30,000 - 22,000=−22,000 = -2,000, indicating the owner would be better off pursuing alternative opportunities. Students often forget to include all opportunity costs, particularly the rental value of owned assets. Remember the formula: economic profit = total revenue - explicit costs - implicit costs, and always check for hidden opportunity costs.

Question 16

Based on the firm's cost and revenue information, which statement correctly compares accounting and economic profit? A firm has total revenue of $1,200 per week. Explicit costs are $700 in wages and $200 in rent. The owner also uses a building that could be rented out for $150 per week and $1,000 of personal funds that could earn $20 per week elsewhere.

  1. Accounting profit is $300 per week, and economic profit is $130 per week. (correct answer)
  2. Accounting profit is $300 per week, and economic profit is $300 per week.
  3. Accounting profit is $130 per week, and economic profit is $300 per week.
  4. Accounting profit is $0 per week, and economic profit is $0 per week.
  5. Accounting profit is $470 per week, and economic profit is $130 per week.

Explanation: This question tests your understanding of types of profit by comparing accounting and economic profit calculations. Accounting profit equals total revenue minus explicit costs, economic profit equals total revenue minus both explicit and implicit costs, and normal profit occurs when economic profit equals zero. The firm has total revenue of $1,200, explicit costs of 900(900 (700 wages + $200 rent), and implicit costs of 170(170 (150 forgone rent + $20 forgone interest). Accounting profit = $1,200 - $900 = $300, and economic profit = $1,200 - $900 - $170 = $130, confirming answer A is correct. A common misconception is thinking accounting and economic profit are the same, ignoring implicit costs entirely. To solve profit comparison problems, calculate accounting profit first (TR - explicit costs), then subtract implicit costs to find economic profit.

Question 17

Based on the firm's cost and revenue information, which statement correctly compares accounting and economic profit? A car-wash earns total revenue of $110,000 and has explicit costs of $85,000. The owner gives up a $20,000 salary elsewhere and uses land he owns that could be leased for $8,000 per year.

  1. Accounting profit is $25,000 and economic profit is $-3,000. (correct answer)
  2. Accounting profit is $-3,000 and economic profit is $25,000.
  3. Accounting profit is $25,000 and economic profit is $25,000.
  4. Accounting profit is $3,000 and economic profit is $-3,000.
  5. Accounting profit is $0 and economic profit is $0.

Explanation: This question tests your ability to calculate and compare types of profit for a car-wash business. Accounting profit equals revenue minus explicit costs alone, economic profit equals revenue minus all costs (explicit and implicit), and normal profit occurs when economic profit is zero. The car-wash has total revenue of $110,000, explicit costs of $85,000, and implicit costs of 28,000(28,000 (20,000 forgone salary + $8,000 forgone land lease). Accounting profit = $110,000 - $85,000 = $25,000, and economic profit = $110,000 - $85,000 - 28,000=−28,000 = -3,000, confirming answer A is correct. Students often misunderstand that negative economic profit doesn't mean bankruptcy—it means the owner would earn more using their resources differently. The systematic approach: calculate accounting profit first (TR - explicit costs), then economic profit (TR - explicit costs - implicit costs). This method clearly shows how opportunity costs can turn an accounting profit into an economic loss.

Question 18

Based on the firm's cost and revenue information, is the firm earning normal profit? A sole proprietor has total revenue of $900 per month. Explicit costs are $400 for materials and $200 for utilities and other bills. The owner gives up a $250-per-month job to run the business and uses $5,000 of personal funds that could earn $50 per month elsewhere.

  1. Yes, because economic profit is $0 per month. (correct answer)
  2. Yes, because accounting profit is $0 per month.
  3. No, because economic profit is $200 per month.
  4. No, because revenue is positive so normal profit is impossible.
  5. No, because economic profit is $-100 per month.

Explanation: This question tests your understanding of types of profit, specifically the concept of normal profit. Accounting profit equals total revenue minus explicit costs, economic profit equals total revenue minus both explicit and implicit costs, and normal profit occurs when economic profit equals zero. The firm has total revenue of $900, explicit costs of 600(600 (400 materials + $200 utilities), and implicit costs of 300(300 (250 forgone wage + $50 forgone interest). Economic profit = $900 - $600 - $300 = $0, which means the firm is earning exactly normal profit, confirming answer A is correct. A common misconception is thinking normal profit means the firm earns no money, when it actually means covering all costs including opportunity costs. To determine if a firm earns normal profit, calculate economic profit using the formula: economic profit = TR - explicit costs - implicit costs; if the result is zero, the firm earns normal profit.

Question 19

Based on the firm's cost and revenue information, is the firm earning normal profit? A consulting firm has total revenue of $120,000 and explicit costs of $100,000. The owner gave up a $15,000 job salary and invested $50,000 of personal funds that could have earned $5,000 in interest elsewhere.

  1. Yes; economic profit is $20,000, so the firm earns normal profit.
  2. Yes; economic profit is $0, so the firm earns normal profit. (correct answer)
  3. No; economic profit is $0, so the firm does not earn normal profit.
  4. No; revenue is not zero, so the firm cannot be earning normal profit.
  5. No; economic profit is $-20,000, so the firm does not earn normal profit.

Explanation: This question tests whether you can identify normal profit, one of the three types of profit in economics. Accounting profit considers only explicit costs, economic profit includes both explicit and implicit costs, and normal profit occurs specifically when economic profit equals zero (meaning the firm covers all costs including opportunity costs). The consulting firm has total revenue of $120,000, explicit costs of $100,000, and implicit costs of 20,000(20,000 (15,000 forgone salary + $5,000 forgone interest). Economic profit = $120,000 - $100,000 - $20,000 = $0, which means the firm is earning exactly normal profit, making answer B correct. A common misconception is thinking normal profit means zero accounting profit or that the firm isn't profitable—in reality, normal profit means the firm is doing exactly as well as its next-best alternative. The transferable strategy is: when economic profit = TR - explicit costs - implicit costs = 0, the firm earns normal profit. This indicates the business is competitive but not superior to other opportunities.

Question 20

Based on the firm's cost and revenue information, what is the firm's economic profit? A firm earns total revenue of $800 per week. Explicit costs are $300 for supplies and $250 for hired labor. The owner works in the business and gives up a $150-per-week wage elsewhere, and the owner's $2,000 of equipment could be rented out for $40 per week.

  1. $250 per week
  2. $100 per week
  3. $60 per week (correct answer)
  4. $-60 per week
  5. $0 per week

Explanation: This question tests your understanding of types of profit, specifically calculating economic profit. Accounting profit equals total revenue minus explicit costs, economic profit equals total revenue minus both explicit and implicit costs, and normal profit occurs when economic profit equals zero. The firm has total revenue of $800, explicit costs of 550(550 (300 supplies + $250 labor), and implicit costs of 190(190 (150 forgone wage + $40 forgone equipment rental). Economic profit = $800 - $550 - $190 = $60, confirming answer C is correct. A common misconception is forgetting to include the opportunity cost of capital equipment that could generate rental income. To solve economic profit problems systematically, use the formula: economic profit = TR - explicit costs - implicit costs, ensuring you account for all resources the owner contributes.