I need an explanation for the solution

You are a distributor of automotive wiper blades. At present, you sell an average of 40,000 pairs of blades per year at an average price of $12.50. The cost to purchase these blades from the manufacturer is $7.50 per pair.

You have annual fixed costs of $75,000 for rent, insurance, etc.

A) Create a high-quality spreadsheet model that calculates the annual costs, revenue, and profit.

You are considering offering your customers a rebate of $2.50 per pair, and you believe that this debate will increase sales volume by 15%. You also think that only about 50% of customers will actually take advantage of the rebate offer (the rest will just forget to request the rebate).

B) Create an industrial-quality spreadsheet model that calculates the annual costs, revenue, and profit, with the rebate.

C) The performance measure is annual profit; create a delta cell (or change from the base). What is the delta if 70% of customers actually take advantage of the rebate program?

D) Would you recommend that the company institute the rebate program? Briefly justify your answer