Assume that a purely competitive firm has the following schedule of average and marginal costs: Output AFC AVC ATC MC
1 $300 $100 $400 $100
2 150 75 225 50
3 100 70 170 60
4 75 73 148 80
5 60 80 140 110
6 50 90 140 140
7 43 103 146 180
8 38 119 156 230
9 33 138 171 290
10 30 160 190 360
Instructions: Enter all values as whole numbers. If any values are negative, please enter them with a (-) sign.
a) At a price $55, the firm would produce units of output. At a price of $120, the firm would produce units of output. At a price of $200, the firm would produce units of output.
b) The per-unit economic profit (or loss) is calculated by subtracting at a particular level of output from the product price. This per-unit economic profit is then multiplied by the number of units of ___ to determine the economic profit for the competitive firm.
i) At the product price of $200, the average total costs are $, so per-unit economic profit is
$. Multiplying this amount by the number of units of output results in an economic
profit of $.
ii) At the product price of $120, the average total costs are $, so per-unit economic losses are $. Multiplying this amount by the number of units of output results in an economic loss of $.

a) At a price $55, the firm would produce 3 units of output.

At a price of $120, the firm would produce 6 units of output.

At a price of $200, the firm would produce 7 units of output.

The rule is Price = Marginal Cost for a competitive firm

b) The per-unit economic profit (or loss) is calculated by subtracting ATC at a particular level of output from the product price. This per-unit economic profit is then multiplied by the number of units of output to determine the economic profit for the competitive firm.

i) At the product price of $200, the average total costs are $146 , so per-unit economic profit is $54 . Multiplying this amount by the number of units of output results in an economic profit of $378 .

Explanation:

At P = 200, output produced is 7 units

ATC is $146

Per-unit economic profit = 200 - 146 = $54

Hence, Total economic profit = $54 x 7 = $378

ii) At the product price of $120, the average total costs are $140 , so per-unit economic losses are $ -20. Multiplying this amount by the number of units of output results in an economic loss of $-100.

Explanation: At P = 20, output produced will be 5 units. 6th unit will not be produced as it will result in even greater loss.

Total loss = ($140 - $120) x 5 = $100

this business is a price setter.

hope this