Econ Test 3

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Wanda owns a lemonade stand. She produces lemonade using five inputs: water, sugar, lemons, paper cups, and labor. Her costs per glass are as follows: $0.01 for water, $0.02 for sugar, $0.03 for lemons, $0.02 for cups, and $0.10 for the opportunity cost of her labor. She can sell 300 glasses for $0.50 each.

$126

Suppose that for a particular firm the only variable input into the production process is labor and that output equals zero when no workers are hired. In addition, suppose that the average total cost when 5 units of output are produced is $30, and the marginal cost of the sixth unit of output is $60. What is the average total cost when six units are produced?

$35

How to calculate average variable cost

Total Variable Costs / Total Output (Q)

Grace is a self-employed artist. She can make 20 pieces of pottery per week. She is considering hiring her sister Kate to work for her. Both she and Kate can make 35 pieces of pottery per week. What is Kate's marginal product?

15 pieces of pottery

How to calculate average fixed cost

Average Total Cost - Average Variable Cost

How to calculate marginal cost

Change in total cost / Change in total output

How to calculate average total cost

Total Cost / Quantity

What represents the firm's long run condition for exiting a market

exit if P<ATC

A competitive market is in long-run equilibrium. If demand decreases, we can be certain that price will a. fall in the short run. All firms will shut down, and some of them will exit the industry. Price will then rise to reach the new long-run equilibrium.

fall in the short run. All, some, or no firms will shut down, and some of them will exit the industry. Price will then rise to reach the new long-run equilibrium

A long-run supply curve is flatter than a short-run supply curve because

firms can enter and exit a market more easily in the long run than in the short run

Suppose that a "doggie day care" firm uses only two inputs: hourly workers (labor) and a building (capital). In the short run, the firm most likely considers

labor to be variable and capital to be fixed

When fixed costs are ignored because they are irrelevant to a business's production decision, they are called

sunk costs

When price exceeds average variable cost in the short run, a competitive firm's marginal cost curve is regarded as its supply curve because

the marginal cost curve determines the quantity of output the firm is willing to supply at any price

The competitive firm's long-run supply curve is that portion of the marginal cost curve that lies above average

total cost


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