You have been pricing a laptop computer in several stores. Three stores have the exact same price of $1,600. Each of these stores charges 18 percent APR, has a 30-day free-ride, and sends out bills on the first of the month. On further investigation, you find that Store X calculates the finance charge by using the average daily balance method, Store Y uses the adjusted balance method, and that Store Z uses the previous balance method. Assume that you purchased the computer on May 5 and that you made a $100 payment on June 15. What will the finance charge be for June if you made your purchase from Store X? From Store Y? From Store Z? (Show your calculations).