A bakery operating in competitive markets sells its output for $20 per cake and pays workers $10 per hour. To maximize profit, it should hire workers until the marginal product of labor is
a. 1/2 cake per hour.
b. 2 cakes per hour.
c. 15 cakes per hour.
d. 10 cakes per hour.
Ans: a. 1/2 cake per hour.
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