Find the a) unpaid balance, b) finance charge, and c) new balance. The periodic rate is 1.5%. 1. Previous Balance Payments & Credits Unpaid Balance + Finance Charge + New Purchases New Balance ( 350.00 75.00 a. +b. 90.00 + c. ( 125.50 45.50 a. + b. 42.50 + C. (437.50 57.50 a. + b. + 222.50 C. + Find the new balance. Previous balance: $1,280; payment: $200; new purchases: $52 and $48; periodic rate: 1.6% $1181.71 Find the a) unpaid balance, b) previous balance, and c) new balance. Use Example 2 to help you. 3. Cody Ray's credit card company uses the unpaid-balance method and charges a monthly periodic rate of 1.8%. His finance charge was $17.54, he made $376.90 in new charges and a $250 payment.