The Table Gives Marginal Product Data for Resources a and B

Multiple Choice

The table gives marginal product data for resources a and b. The output of these independent resources sells in a purely competitive market at $1 per unit. Assuming the prices of resources a and b are $10 and $20 respectively, when the firm hires the profit-maximizing combination of resources, its economic profit will be

A) $140.
B) $222.
C) $117.
D) $82.