Ben Quit His Job as an Economics Professor to Become

Multiple Choice

Ben quit his job as an economics professor to become a golf professional.He gave up his salary ($40,000) and invested his retirement fund of $50,000 (which was earning 10 percent interest) in this venture.After all expenses, his net winnings (profit) were $45,000.Ben's economic profits were

A) $45,000.
B) $5,000.
C) $2,000.
D) zero.