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An engineering consulting office is considering whether to purchase or lease a c

ID: 2762539 • Letter: A

Question

An engineering consulting office is considering whether to purchase or lease a computer printing system. The small system can be purchased for $40,000 with a life of four years and salvage value of $2,000. Operating expenses are expected to be $60 per day and annual maintenance to be $500 per year. An identical system can be leased for $ 125 per day, including maintenance and operating expenses. Determine the number of days per year that the system would have to be used to make the purchase economical. The desired ROI of the firm is 15%.

Explanation / Answer

Number of days in a year = X

Annual operating expenses = X × $60 = $60X

Total expenses = Annual operating + Annual maintenance

                        = $60X + $500

PW = Initial cost + Present value of total expenses – Present salvage value

       = 40,000 + (60X + 500) (PV accumulated 15%, 4 years) – 2,000 (PV at 15%, 4 years)

       = 40,000 + (60X + 500) × 2.8550 – 2,000 × 0.5718

       = 40,000 + 171.30X + 1,427.50 – 1,143.60

       = 40,283.90 + 171.30X

Lease expense per day = $125

Lease expense per year = $125X

PW of lease expense = 125X (PV accumulated 15%, 4 years)

                                    = 125X × 2.8550

                                    = 356.875X

The purchase will be economical if PW of purchase = PW of lease expense

40,283.90 + 171.30X = 356.875X

185.575X = 40,283.90

X = 40,283.90 / 185.575 = 217

Answer: The number of days per year would be 217.