Given	Principal: $13,500, 6%, 240 days
	Partial payments:	On 100th day, $5,200
		On 180th day, $3,100

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.)

Total interest cost

$

b.	Use the U.S. Rule to solve for balances. (Use 360 days a year. Do not round intermediate calculations. Round your answer to the nearest cent.)

	On 100th day	On 180th day
Balance after the payment	$	$

c.	Use the U.S. Rule to solve for final payment. (Use 360 days a year. Do not round intermediate calculations. Round your answer to the nearest cent.)

Final payment

$