Answer:
a. $0
Step-by-step explanation:
The economic profit is considers the opportunity cost while the accounting profit does not. The cost of the alternatives forgone is deducted from the explicit cost in the determination of economic profit.
Mathematically,
Economic profit = Revenue - (implicit + explicit costs)
= $150,000 - $85,000 - $65,000
= $0
He neither made a profit nor a loss economically.