Given Principal $18,000, Interest Rate 9%, Time 240 days (use ordinary interest) Partial payments: On 100th day,

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Question:

Given Principal $18,000, Interest Rate 9%, Time 240 days (use ordinary interest) Partial payments: On 100th day, $7,600 On 180th day, $4,300

a. Use the U.S. Rule to solve for total interest cost.

b. Use the U.S. Rule to solve for balances.

c. Use the U.S. Rule to solve for final payment.