Consider the Following Production and Cost Schedule for a Firm

Multiple Choice

Consider the following production and cost schedule for a firm.The first column shows the number of units of a variable factor of production employed by the firm.
TABLE 13-1
-Refer to Table 13-1.The marginal revenue product of the 15th unit of the factor is

A) -$20.
B) $20.
C) $60.
D) $150.
E) $820.