7. Comparing Costs of Credit Using Three Calculation Methods. You have been pricing a compact disk player in several stores.

Three stores have the identical price of $300. Each store charges 18 percent APR, has a 30-day grace period, and sends out bills on the first of the month. On further investigation, you find that store A calculates the finance charge by using the average daily balance method, store B uses the adjusted balance method, and store C uses the previous balance method. Assume you purchased the disk player on May 5 and made a $100 payment on June 15. What will the finance charge be if you made your purchase from store A? From store B? From store C? (Obj. 2)