Use the data in the tables to answer the question that follows.
Market
Price of Output Quantity Supplied of Output Quantity Demanded of Output
$5 25,000 60,000
$10 50,000 50,000
$15 75,000 40,000
$20 100,000 30,000
$25 125,000 20,000
Firm
Quantity of Labor Total Product
0 0
15 105
30 190
45 265
60 325
What is the marginal revenue product of the 60th unit of labor, assuming this market is perfectly competitive in both the factor and output markets? A. $30
B. $40
C. $80
D. $100
E. $3,250