All-Leather is a tanning company in Chicago. Its total cost function is C(QA) = 125 + 8QA + 5QA2, where QA is leather production per week in thousands of pounds.
a) What is the formula for All-Leather’s marginal cost function?
b) If leather sells for $408 per thousand pounds, how much leather will All-Leather produce?
c) How much profit will All-Leather make?
A) Given that, Total cost = C(QA) = 125+8QA + 5QA2
Therefore, MC = d(TC)/d(QA) = d[C(QA)]/d(QA) = 0 + 8 + 10QA = 8 + 10QA
B) If price = $408 per thousands of pounds, the company will produce at the point where price = MC to maximize profit.
Therefore, setting Price = MC,
8 + 10QA = 408
Or, 10QA = 400
Or, QA = 40
Therefore, the leather company will produce 40 thousands of pounds leather.
C) Total revenue = price * quantity = $(408 * 40 ) = $16,320
And, TC = 125 + (8*40) + (5*402) = 125+320+8000 = $8445
Profit = TR - TC = $(16,320 - 8445) = $ 7875
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