Assume a wheat producing farmer engaging in selling its product under perfect competition market faces cost functions as TC= Q3 -2Q2 +8Q and Average revenue of the farmer is given as Birr 8 . Having this information, A) Determine the optimal level of output and price in the short run. B) Calculate the economic profit (loss) the farmer will obtain (incur
Solution:
A.). Optimal level of output is where MR = MC:
Under perfect competition = AR = MR = 8
MC = "\\frac{\\partial TC} {\\partial Q}" = 3Q2 – 4Q + 8
8 = 3Q2 – 4Q + 8
Q = 1.33
The optimal level of output in the short-run is = 1.33
Price = 8
B.). Economic profit = TR – TC
TR = P "\\times" Q = 8 "\\times" 1.33 = 10.64
TC = Q3 -2Q2 +8Q = 1.333 – 2(1.332) + 8(1.33) = 2.353 – 3.538 + 10.64 = 9.46
Economic Profit = 10.64 – 9.46 = 1.18
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