Q: Which of the following equations correctly represents profit?

$$\text{Profit} = \text{Total Revenue} - \text{Total Cost}$$

Q: If a firm’s total cost at 200 units is $$1200$$ and the market price is $$8$$, what is the firm’s profit?

$$(8 \times 200) - 1200 = 1600 - 1200 = 400$$

Q: Which of the following is the correct formula for average variable cost (AVC)?

$$AVC = \frac{\text{Total Variable Cost}}{\text{Quantity}}$$

Question 1

In a perfectly competitive market, at what point does a firm maximize its profit?

Accepted Answer

Where $$MR = MC$$

Question 2

A perfectly competitive firm should stop producing additional units when:

Accepted Answer

The marginal cost of the next unit exceeds marginal revenue

Question 3

Which of the following best describes the characteristics of a perfectly competitive market?

Accepted Answer

Many buyers and sellers, identical products, firms are price takers

Question 4

If the market price is $$10$$, the marginal cost of producing the 100th unit is $$10$$, and the average total cost at 100 units is $$8$$, what is the economic profit for producing 100 units?

Accepted Answer

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

Question 5

Which of the following equations correctly represents profit?

Accepted Answer

$$	ext{Profit} = 	ext{Total Revenue} - 	ext{Total Cost}$$

Question 6

A firm in perfect competition is considered a price taker because:

Accepted Answer

It cannot influence the market price and must accept the equilibrium price

Question 7

If a perfectly competitive firm faces a market price below its average variable cost, what should it do in the short run?

Accepted Answer

Shut down production immediately

Question 8

Suppose a cotton farmer’s total revenue is $$5000$$ and total cost is $$4000. $$What is the area of economic profit?

Accepted Answer

$$5000 - 4000 = 1000$$

Question 9

Which of the following is the correct shutdown rule for a perfectly competitive firm in the short run?

Accepted Answer

Shut down if $$P \u003c AVC$$

Question 10

If a firm’s marginal cost curve is above its average variable cost curve, what does this indicate?

Accepted Answer

Average variable cost is rising

Question 11

At what output level does a perfectly competitive firm maximize profit?

Accepted Answer

Where $$P = MC$$

Question 12

If a firm’s total cost at 200 units is $$1200$$ and the market price is $$8$$, what is the firm’s profit?

Accepted Answer

$$(8 	imes 200) - 1200 = 1600 - 1200 = 400$$

Question 13

Which of the following is NOT a characteristic of perfect competition?

Accepted Answer

Firms can set their own prices

Question 14

If a firm’s average total cost is $$5$$ and the market price is $$7$$, what is the per-unit economic profit?

Accepted Answer

$$7 - 5 = 2$$

Question 15

Which of the following best explains why a perfectly competitive firm’s demand curve is perfectly elastic?

Accepted Answer

The firm can sell any quantity at the market price but none at a higher price

Question 16

If a firm’s marginal cost is below the market price, what should the firm do to maximize profit?

Accepted Answer

Increase output

Question 17

Which shaded area on a cost curve graph represents economic profit?

Accepted Answer

The area between price and average total cost, up to the profit-maximizing quantity

Question 18

If a firm is producing at a quantity where $$MR \u003e MC$$, what should it do?

Accepted Answer

Increase output

Question 19

Which of the following is the correct formula for average variable cost (AVC)?

Accepted Answer

$$AVC = \frac{	ext{Total Variable Cost}}{	ext{Quantity}}$$

Profit Maximization and Perfect Competition: Key Concepts and Calculations

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