Answer: D) All of the above are correct.
Explanation:
Implicit costs are the opportunity costs which refers to the value of the next best alternative to the current decision path. As Dr. Lopez quit a job that was paying $100,000 in order to open this practice, that would be his implicit costs.
His accounting profit is;
= Revenue - expenses
= 400,000 - 80,000 - 60,000 - 25,000 - 150,000 - 10,000
= $75,000
His economic profit;
= Accounting profit - Implicit costs
= 75,000 - 100,000
= -$25,000