Answer:
a) $160,000
Explanation:
Economic Profit is calculated by deducting the opportunity cost  and monetary costs from the revenue. Whereas Accounting Profit can be calculated by deducting the only monetary costs from the revenue. Â
Economic profit = Revenue - Opportunity cost - Monetary cost
Revenue = 11,000 units x $75 = $825,000
Opportunity costs
Salary = $45,000
Entrepreneurial income = $5,000
Interest Income = $100,000 x 10% = $10,000
Total Opportunity cost = $60,000
Monetary costs
Cost = 11,000 units x $55 = $605,000
Economic profit = $825,000 - $60,000 - $605,000 = $160,000