Gary's unpaid credit card balance is 2543.32. His APR is 17.4%, and he made one new translation for 320

What is his new balance

New balance = unpaid balance + periodic interest of unpaid balance + new transaction

Periodic interest rate = APR/12

= 17.4%/12

= 1.45%

unpaid credit card balance = 2543.32

new transaction = 320

New balance = 2543.32 + (0.0145 x 2543.32) + 320

New balance credit card balance = 2900.19814