Answer:
(i) $10,000
(ii) (-$20,000)
Explanation:
Revenue = $140,000
Explicit cost includes:
Overhead paid = $30,000
Wages paid = $80,000
Insurance paid = $20,000
Implicit cost includes:
Earning as a teacher = $30,000
Accounting profit = Revenue - Explicit cost
= 140,000 - (30,000 + 80,000 + 20,000 )
= $10,000
Economic profit = Accounting profit - Implicit cost
= 10,000 - 30,000
= (-$20,000)