PLEASE I NEED HELP ASAP!!!!!

part 1) The Healthy Pantry bought new shelving and financed $7,300 with 36 monthly payments of $267.65 each.
Suppose the firm pays the loan off with 13 payments left.

Use the Rule of 78 to find the amount of unearned interest.

part 2) The Healthy Pantry bought new shelving and financed $7,300 with 36 monthly payments of $267.65 each.
Suppose the firm pays the loan off with 13 payments left.

Use the Rule of 78 to find the amount necessary to pay off the loan.