Engineering Economy (17th Edition)
Engineering Economy (17th Edition)
17th Edition
ISBN: 9780134870069
Author: William G. Sullivan, Elin M. Wicks, C. Patrick Koelling
Publisher: PEARSON
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Chapter 12, Problem 11P

(a):

To determine

Calculate the expected present worth.

(b):

To determine

Selection of the project.

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Q6) A new municipal refuse-collection truck can be purchased for $94,000. Its expected useful life is six years, at which time its market value will be 20o0$. Annual receipts less expenses will be approximately $17,000 per year over the six-year study period. Use the PW method and a MARR of 18% to justify whether this is a good investment.
Jane Livingston, an industrial engineer at Energy Conservation Service, hasfound that the anticipated profitability of a newly developed water-heaterthe temperature-control device can be measured by net present worth as PW = 5.63V(4.3X - $15) - 33,580 where Vis the number of units produced and sold and X is the sales price per unit. She also found that the V parameter value could occur anywhere in the range of 1,500 to 5,000 units and the X parameter value anywhere between $10 and $35 per unit. Develop a sensitivity graph as a function of the number of units produced and sales price per unit.
A remotely situated fuel cell has an installed cost of $2,000 and will reduceexisting surveillance expenses by $350 per year for eight years. The border security agency’s MARR is 10% per year. Solve, a. What is the minimum salvage (market) value after eight years that makes the fuel cell worth purchasing? b. What is the fuel cell’s IRR if the salvage value is negligible?
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