Answer: Economic cost = $175,000
Accounting cost = $100,000
Explanation: The difference between economic cost and accounting coast is economic cost takes into consideration the next best alternative foregone, that is, opportunity cost whereas accounting cost only sums cost incurred. In the given case the interest on savings and salary of job is the opportunity cost of Jill.
Therefore,
Economic cost = $5000 + $70,000 + $80,000 + $40,000 - $20,000=$175,000
Accounting cost = $80,000 + $20,000 = $100,000