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12. (EAIR in loans) You\'re considering buying a new top-of-the-line luxury car.

ID: 2817014 • Letter: 1

Question

12. (EAIR in loans) You're considering buying a new top-of-the-line luxury car. The car's list price is $99,000. The dealer has offered you two alternatives for purchasing the car: .You can buy the car for $90,000 in cash and get a $9,000 discount in the bargain. You can buy the car for the list of $99,000. In this case, the dealer is willing to take $39,000 as an initial payment. The remainder of $60,000 is a “zero-interest loan" to be paid back in equal install- ments over 36 months. Alternatively, your local bank is willing to give you a car loan at an annual interest rate of 10%, compounded monthly (that is, 10%/12 per month). Decide how to finance the car: Bank loan or zero-interest loan with the dealer, or cash payment.

Explanation / Answer

Option 1:

Bank Loan = $ 90000

In this case, let us assume that loan is repaid in 3 years.

EMI Per month

Loan Amount = EMI / (1+(0.10/12))^1 + EMI / (1+(0.10/12))^2 +.....+ EMI / (1+(0.10/12))^35+ EMI / (1+(0.10/12))^36

90000 = EMI / (1+(0.10/12))^1 + EMI / (1+(0.10/12))^2 +.....+ EMI / (1+(0.10/12))^35+ EMI / (1+(0.10/12))^36

Solving above equation we get

EMI = $ 2904 per month

Now future value of all EMI's at end of 3 years = 2904*(1+(0.1/12))^1 + 2904*(1+(0.1/12))^2 + .... +  2904*(1+(0.1/12))^36 = $122345

Option 2: zero interest loan

EMI = 60000/36 = 1667

Future value of all payments: 1667 *(1+(0.1/12))^1+1667 *(1+(0.1/12))^2+....+1667 *(1+(0.1/12))^36 + 39000 *(1+(0.1/12))^36

= 70230 + 52579 = $122809

Option 3: Cash Payment

Future Value of Cash payment = 90000*(1+0.10/12)^36 = $121336

Option 3 - Cash purchase is the best choice as it involves the minimum payment

PS: we can solve the above sum by comparing the present value of payments as well