Figure 18-1

question 43

Multiple Choice

Figure 18-1.On the graph,L represents the quantity of labor and Q represents the quantity of output per week.
-Refer to Figure 18-1.Suppose the firm sells its output for $10 per unit,and it pays each of its workers $400 per week.When the number of workers increases from 4 to 5,

• A) the marginal revenue is $450 per unit of output and the marginal cost is $400 per unit of output.
• B) the value of the marginal product of labor is $3,900 and the marginal cost per unit of output is $400.
• C) the value of the marginal product of labor is $450 and the marginal cost per unit of output is about $8.89.
• D) the firm's profit increases.

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