Final answer:
The amount financed is $60,480, the total installment cost is $76,719.24, the finance charge is $16,239.24, and the approximate APR is 36.28%.
Step-by-step explanation:
To find the amount financed, we need to calculate the down payment and subtract it from the total cost of the lathe. The down payment is 20% of $75,600, which is $15,120. So the amount financed is $75,600 - $15,120 = $60,480.
To find the total installment cost, we need to multiply the monthly payment by the number of payments. The monthly payment is $2,131.09 and the number of payments is 36, so the total installment cost is $2,131.09 * 36 = $76,719.24.
To find the finance charge, we need to subtract the amount financed from the total installment cost. The finance charge is $76,719.24 - $60,480 = $16,239.24.
To estimate the APR, we can use the given formula: Approximate APR = (24 x Finance charge) / (Amount financed * (1 + Total number of payments)). Plugging in the values, we get Approximate APR = (24 x $16,239.24) / ($60,480 * (1 + 36)). Simplifying this, we get Approximate APR ≈ 0.3628 or 36.28%.