Q: Suppose a firm produces 100 units, the market price is $$10$$, and the average total cost (ATC) is $$8. $$What is the firm's profit?

$$Profit = (10 - 8) \times 100 = 200$$

Q: A firm faces the following: $$P = 15$$, $$ATC = 20$$, $$Q = 50. $$What is the firm's profit or loss?

$$Profit = (15 - 20) \times 50 = -250 ($$loss)

Question 1

According to the profit-maximizing rule, at what point should a firm choose its output level?

Accepted Answer

Where marginal cost (MC) equals marginal revenue (MR)

Question 2

Given the profit formula $$Profit = (Price - ATC) 	imes Quantity$$, what does it mean if $$Price \u003e ATC at $$the profit-maximizing quantity?

Accepted Answer

The firm is earning a profit

Question 3

If a firm finds that $$Price = ATC at $$the profit-maximizing quantity, what is the firm's economic profit?

Accepted Answer

Zero (break-even)

Question 4

Suppose a firm produces 100 units, the market price is $$10$$, and the average total cost (ATC) is $$8. $$What is the firm's profit?

Accepted Answer

$$Profit = (10 - 8) 	imes 100 = 200$$

Question 5

Which of the following statements is TRUE about the relationship between price, ATC, and profit?

Accepted Answer

If $$Price \u003c ATC$$, the firm incurs a loss

Question 6

A firm is producing at a quantity where $$MC = MR$$ and $$P \u003c ATC. $$What is the firm's situation?

Accepted Answer

The firm is maximizing output but incurring a loss

Question 7

If the marginal cost (MC) curve intersects the average total cost (ATC) curve at its minimum point, what does this indicate?

Accepted Answer

ATC is minimized at this quantity

Question 8

A firm faces the following: $$P = 15$$, $$ATC = 20$$, $$Q = 50. $$What is the firm's profit or loss?

Accepted Answer

$$Profit = (15 - 20) 	imes 50 = -250 ($$loss)

Question 9

Which of the following best describes the break-even point for a firm?

Accepted Answer

Where $$Price = ATC$$ and profit is zero

Question 10

If a firm is producing at the quantity where $$MR = MC$$ but $$P \u003c ATC$$, what should the firm consider in the short run?

Accepted Answer

Whether price covers average variable cost (AVC)

Question 11

Which of the following is NOT a step in finding profit or loss on a cost curve graph?

Accepted Answer

Find where ATC equals AVC

Question 12

A firm’s marginal cost (MC) curve is upward sloping and intersects the average total cost (ATC) curve at $$Q = 10. If $$the market price is above ATC at $$Q = 10$$, what is true?

Accepted Answer

The firm is earning a profit at $$Q = 10$$

Question 13

If a firm’s price is below average total cost but above average variable cost at the profit-maximizing quantity, what should the firm do in the short run?

Accepted Answer

Continue operating to minimize losses

Question 14

Which formula correctly calculates a firm’s profit or loss?

Accepted Answer

$$Profit = (Price - ATC) 	imes Quantity$$

Question 15

A firm’s cost curves show $$MC$$ crossing $$ATC at$$ $$Q = 20. At $$this output, $$P = 25$$ and $$ATC = 25. $$What is the firm’s profit?

Accepted Answer

$$Profit = (25 - 25) 	imes 20 = 0 ($$break-even)

Question 16

If a firm is maximizing profit where $$MR = MC$$ and $$P \u003e ATC$$, what is the economic implication?

Accepted Answer

The firm is earning positive economic profit

Question 17

Which of the following best describes the role of the marginal cost (MC) curve in profit maximization?

Accepted Answer

It determines the profit-maximizing output where it equals MR

Question 18

A firm’s ATC curve is U-shaped. What does the downward-sloping portion of the ATC curve represent?

Accepted Answer

Economies of scale

Question 19

If a firm’s price is equal to average total cost at the profit-maximizing quantity, what is the firm’s total profit?

Accepted Answer

$$Profit = 0$$

Question 20

Which of the following is a necessary condition for a firm to maximize profit?

Accepted Answer

$$MR = MC$$

Profit Maximization and Firm Outcomes in Microeconomics

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