Stuck on a a math problems in Math 105. Can someone help me out and show me what I did wrong? Thanks again, Calvin (Below is the problem and my work/answer I got for it)

Aaron had an unpaid balance of $637.24 on his credit card statement at the beginning of March. He made a payment of $25.00 during the month and made purchases of $375.44. If the interest rate on Aaron's cred card was 12% per month on the unpaid balance, find his finance charge and the new balance on April 1.

637.24 - 25.00 + 375.44 = 987.68

987.68 x 0.12 = 118.52

637.24 + 118.52 = 755.76

Finance charge: $987.68

New balance: $755.76