Given Principal: $14,500,8%,240 days Partial payments: On 100 th day, $5,600 On 180th day, $3,300 a. Use the U.S. Rule to solve for total interest cost. (Use 360 days a year. Do not round intermediate calculations. Round your answer to the nearest cent.) b. Use the U.S. Rule to solve for principal balSices. (Use 360 days a year. Do not round intermediate calculations. Round your answers to the nearest cent.) c. Use the U.S. Rule to solve for final payment. (Use 360 days a yeat, Do not round intermediate calculations. Round your answer to the nearest cent.)