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ui 1 (15 points). Assume that each competitive firm in an industry has the short

ID: 1122814 • Letter: U

Question

ui 1 (15 points). Assume that each competitive firm in an industry has the short-run cost function C - 50+5q+q2, the market price is $35, and the fixed costs are sunk cost in the short run. (7 points) what is the profit-maximizing output level for each firm? What is the total revenue? What are the profits? (8 points) Suppose, in the question above, that fixed costs were $250 instead of $50. How does this change affect the firm's output decision and profits? Should the firm continue to operate? a. b.

Explanation / Answer

a). i). Solution :- C = 50 + 5q + q2 (Total cost function)

MC = 5 + 2q (Marginal cost function is the first derivative of total cost function.)

P = $ 35 (Given in the question)

The firm will maximize profits by producing at that level of output where the Price (P) equals to the Marginal Cost (MC).

Equating P and MC in the given question,

35 = 5 + 2q

35 - 5 = 2q

30 = 2q

q = 30 / 2

q = 15.

Conclusion :- Profit-maximizing level of output for the firm in an industry = 15 units.

a). ii). Solution :- Total revenue = Price * Quantity.

= 35 * 15

= $ 525.

Total cost = 50 + 5 * 15 + (15)2 (Put the value of q = 15 in the total cost function given in the question)

= 50 + 75 + 225

= $ 350.

Profits = Total revenue - Total cost.

= 525 - 350

= $ 175.

Conclusion :-

Total revenue of the firm $ 525 Profit of the firm $ 175