7. There were 31 days in the last billing period. Your previous balance was $562.34. This was the balance for 14 days, when you made a $50.00 payment. The new balance was $512.34 for the remaining 17 days.
The periodic rate is 2.3%. You also made purchases totaling $144.55. Show all of your work to find the new balances if your credit card company calculated the finance charge using:
a. Previous Balance Method
b. Unpaid Balance Method
c. Average Daily Balance Method
Show all of the work needed to solve this problem.