A firm has $200 million in total revenue and explicit costs of $190 million. Suppose its owners have invested $100 million in the company at an opportunity cost of 10 percent interest rate per year....

A firm has $200 million in total revenue and explicit

costs of $190 million. Suppose its owners have

invested $100 million in the company at an opportunity cost of 10 percent interest rate per year. The

firm’s economic profit is

a. $400 million.

b. $100 million.

c. $80 million.

d. zero.