Joan quit her job where she earned $50,000. She started a business by using $100,000 that she had just inherited instead of investing the money that could have earned 10% a year. The business had sales that equaled $250,000 the first year and expenses equal to $160,000. The economic profit for business for the first year was:
A.
$90,000.
Correct B.
$30,000.
C.
$40,000.
D.
$80,000.
Explanation: Economic profit equals revenue minus both explicit and implicit costs. $250,000 – $160,000 – $50,000 – ($100,000 × 10%) = $30,000.
Can anyone explain why the investment of $100,000 of inheritance is not an implicit cost (as opposed to just the OC of the foregone interest on that money)??