Contemporary Engineering Economics (6th Edition)
Contemporary Engineering Economics (6th Edition)
6th Edition
ISBN: 9780134105598
Author: Chan S. Park
Publisher: PEARSON
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Chapter 5, Problem 1ST
To determine

Calculate the present worth.

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A machine cost $315,000 to purchase. Fuel, oil, grease, and minor maintenance are estimated to cost $53.50 per operating hour. A set of tires cost $16,000 to replace, and their estimated life is 3,100 use hours. A $17,000 major repair will probably be required after 6,200 hr of use. The machine is expected to last for 9,300 hr, after which it will be sold at a price (salvage value) equal to 13% of the original purchase price. A final set of new tires will not be purchased before the sale. How much should the owner of the machine charge per hour of use, if it is expected that the machine will operate 3,100 hr per year? The company's cost-of-capital rate is 7.25%.
You are about to buy a piece of equipment (machine Alpha) for a project. The initial cost is $500,000 and the annual maintenance costs is $15,000. Another company offers you a second option (Machine Beta) for which the annual maintenance cost is $20,000. What is the maximum price (the initial cost) you would be willing to pay for the second option? Both machines have the same useful life of 11 years and the difference between their performances is negligible. Assume an annual interest rate of 4%. $767,524 $667,197 $456,197 $567,524
. A construction company is considering two possibilities for warehouse operations. Proposal 1 would require the purchase of a forklift for $5,000 and 500 pallets that cost $5 each. The average life of a pallet is assumed to be 2 years. If the forklift is purchased, the company must hire an operator for $9,000 annually and spend $600 per year on maintenance and operation. The life of the forklift is expected to be 12 years with a $700 salvage value. Alternatively, proposal 2 requires that the company hire 2 men to operate power driven hand trucks at a cost of $7,500 per man. One hand truck will be required at a cost of $900. The hand truck will have a life of 6 years with no salvage value. If the company's minimum attractive rate of return is 12%, which alternative should be selected? Use the annual equivalent method.
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