Engineering Economy (16th Edition) - Standalone book
Engineering Economy (16th Edition) - Standalone book
16th Edition
ISBN: 9780133439274
Author: William G. Sullivan, Elin M. Wicks, C. Patrick Koelling
Publisher: PEARSON
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Chapter 9, Problem 17P
To determine

Calculate the present wroth.

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An equipment cost $90.000 initially. The market value the first year was 80,000 and has been declining at the rate of $6.000 yearly. The O & M costs in year 1 were $7.000 and have been increasing by $2.000 from year 2. Determine the minimum cost life of this equipment for a MARR of 10 %. Based on the chart below, a. what is the economic life of this piece of equipment. b. What is the minimum economic cost? OM cost PWCost Year Cost Salvage EUAC 90000 1 7000 $96,363.64 80000 ($26,000.00) 9000 $103,801.65 74000 (524.571.43) 3 11000 $112,066.12 68000 ($24.519.64) 4 13000 $120,945.29 62000 ($24.795.52) 15000 $130,259.11 56000 ($25,189.37) 6 17000 $139,855.17 50000 (525.631.41) 7 19000 $149.605.17 44000 (526.091.88) 8 21000 $159,401.83 38000 ($26,556.05) 9. 23000 $169,156.07 32000 ($27,015.85) 10 25000 $178,794.65 26000 (527.466.63) O a. 6 years b. $27,466.63 O a. 8 years b. $80.000 O a. 3 years b. $25,519.64 O a. 10 years b. $24.664.99
13-16 A 2000-pound, counterbalanced, propane forklift can be purchased for $30,000. Due to the intended service use, the forklift's market value drops 20% of its prior year's value in Years 1 and 2 and then declines by 15% until Year 10 when it will have a scrap/market value of $1000. Maintenance of the forklift is $500 per year during Years 1 and 2 while the warranty is in place. In Year 3 it jumps to $750 and increases $750 per year thereafter. What is the optimal life of the forklift using i = 10%?
A high-speed electronic assembly machine was purchased two years ago for $50,000. At the present time, it can be sold for $25,000 and replaced by a newer model having a purchase price of $42,500; or it can be kept in service for a maximum of one more year. The new assembly machine, if purchased, has a useful life of not more than two years. The projected resale values and operating and maintenance costs for the challenger and the defender are shown in the accompanying table on a year-by-year basis. The before-tax MARR is 15%. Year Challenger Defender Market Value O&M Costs Market Value O&M Costs 0 $42,500 - $25,000 - 1 31,000 $10,000 17,000 14,000 2 25,000 12,500 - - a. What is the total marginal cost of the challenger in EOY 1? b. When should the machine be replaced? c. What is the EUAC of the challenger in EOY 2?
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