Problem
Danielle's credit card statement for December showed these items: 12/1, previous balance, $20.45; 12/3, purchase, $60.40; 12/7, purchase, $54.12; 12/14, purchase $30.50; 12/20, purchase, $12.74; and 7/26, payment, $125. The APR is 24% on new purchases, using a monthly periodic rate. What is Danielle's financial charge for December and her new balance?