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Monthly loan payments Personal Finance Problem Tim Smith is shopping for a used

ID: 2774884 • Letter: M

Question

Monthly loan payments Personal Finance Problem Tim Smith is shopping for a used car. He has found one priced at $4,000. The salesman has told Tim that if he can come up with a down payment of $1,000, the dealer will finance the balance of the price at an annual rate of 9% over 4 years (48 months). Assuming that Tim accepts the dealer's offer, what will his monthly (end-of-month) payment amount be? Use a financial calculator or spreadsheet to help you figure out what Tim's monthly payment would be if the dealer were willing to finance the balance of the car price at an annual rate of 7%?

Explanation / Answer

Cost of Used Car P = $ 4000

Down Payment D = $ 1000

Financed Amount L = $ 4000 - $ 1000 = $ 3000

Annual Rate of Interest = 9%

Monthly Interest rate = 9%/12 = 0.0075

Period = 4 years or 4*12 = 48 months

Monthly instalment A = L * [ (r*(1+r)^n) / ((1+r)^n -1)]

Monthly Instalment A = $ 3000 * [ (0.0075 * (1+0.0075)^48)/(1+0.0075)^48 – 1)]

                                      = $ 3000 * [ (0.0075 * (1.0075)^48)/(1.0075)^48 – 1)]

                                      = $ 3000 * [ (0.0075 * 1.4314053333) / (1.4314053333 – 1)]

                                      = $ 3000 * (0.01073554/0.4314053333)

                                      = $ 3000 * 0.0248850424 = $ 74.6551 or $ 74.66 (rounded off)

Monthly Instalment = $ 74.66

Answer (b)

If the financing is done at an annual rate of 7% per annum or monthly rate of 0.00583333

Monthly Instalment = $ 3000 * [ (0.00583333 * (1.00583333)^48)/(1.00583333)^48 – 1)]

                                     = $ 3000 * [ (0.00583333 * 1.32205367) / (1.32205367-1)]

                                     = $ 3000 * (0.007711975/0.32205367) = $ 3000 * 0.02394624

                                     = $ 71.8387 or $ 71.84 (rounded off)

The result of the same calculated using an online EMI calculator is shown below.

EMI Calculator

Top of Form

Loan amount ($):

Annual interest rate:

%

Loan tenure:

months

Bottom of Form

Equated Monthly Installment Result

$71.84

Loan amount ($):

Annual interest rate:

%

Loan tenure:

months

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