Multiple Choice
Suppose that capital costs $8 per unit and labour costs $4 per unit. For a profit- maximizing firm operating at its optimal factor mix, if the marginal product of capital is 60, the marginal product of labour must be _ .
A) 30
B) 10
C) 120
D) 90
E) 20
Correct Answer:

Verified
Correct Answer:
Verified
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