Integrating Problem Samantha Robert

Integrating Problem Samantha Roberts has a job as pharmacist earning $30,000 per year and she is deciding whether to take another job as the manager of another pharmacy for $40,000 per year or to purchase a pharmacy that generates a revenue of $200,000 per year. To purchase the pharmacy, Samantha would have to use her $20,000 savings and another $80,000 at interest rate of 10 percent per year. The pharmacy that Samantha is contemplating purchasing has additional expenses of $80,000 for supplies,$40,000 for hired help,$10,000 for rent, and $5,000 for utilities. Assume that income and business taxes are zero and that the repayment of the principal of the loan does not start before three years.
(a) What would be the business and economic profit if Samantha purchased the pharmacy? Should Samantha purchase the pharmacy? Should Samantha purchase the pharmacy?
(b) Suppose that Samantha expects that another pharmacy will open nearby at the end of three years and that this will drive the economic profit of the pharmacy to zero. What would the revenue of the pharmacy be in three years?
(c) What theory of profit would account for profits being earned by the pharmacy during the first three years of operation?
(d) Suppose that Samantha expects to sell the pharmacy at the end of three years for $50,000 more than the price she paid for it and that she requires a 15 percent return on her investment. Should she still purchase the pharmacy?