Final answer:
To calculate the APR, use the formula: APR = (total finance charge / loan amount) * (12 / number of months). In this case, the APR is 1740.8%.
Step-by-step explanation:
To calculate the APR, you can use the formula:
APR = (Total finance charge / Loan amount) * (12 / Number of months)
In this case, the total finance charge is $56,550, and the loan amount is $13,100. The number of months is 60. Plugging those values into the formula:

Therefore, the APR is 1740.8%.