How to solve this using the Unpaid balance method.

Unpaid Balance Method Step 1 Divide the annual percentage rate by 12 to find the monthly or periodic interest rate. (Round to the nearest hundredth of a percent when necessary.) Periodic rate= Annual percentage rate 12 Step 2 Calculate the finance charge by multiplying the previous month's balance by the periodic interest rate from Step 1. Finance charge = Previous month's balance x Periodic rate Step 3 Total all the purchases and cash advances for the month. Step 4 Total all the payments and credits for the month. Step 5 Use the following formula to determine the new balance: New balance Previous Finance Purchases and + + balance charge cash advances Payments and credits Think about the following problems and post your replies below. You must show all work to receive partial credit. No credit will be given for correct answers with no supporting work. You answer must be contained in one single post. Problem #1. You have a Macy's credit card account with a 20.99% annual percentage rate calculated on the average daily balance. The billing date is the first day of the month, and the billing cycle is the number of days in that month. Your credit card balance on June 1 was $250. On June 8th you made a $79 purchase. You made another purchase, a $50 gift card, on June 18th. You made a $150 payment on June 28th. (a) What is your finance charge on the account as of July 1st? Show your work. (b) What is your new credit card balance