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 14, Problem 6P

(a):

To determine

Cash flow for the defender.

(b):

To determine

Cash flow for the challenger.

(c):

To determine

Calculate the annual cost.

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K70.
A machine costs $19,310 and is expected to have a scrap value of $2,991 whenever it is retired. Operating and Maintenance costs are $1,047 for the first year and expected to increase by $1,751 thereafter. If the MARR is 12%, determine the minimum equivalent uniform annual cost associated with the optimal economic life of the machine. The service life of this machine is 5 years. Note: round your answer to two decimal places, and do not include spaces, currency signs,
XYZ Company purchased a machine six years ago for $350,000. Last year a replacement study was performed with the decision to retain the machine for 2 more years. However, this year the situation has changed. The machine is estimated to have a value of only $8,000 now and if it is to be kept in service, upgrading at a cost of $50,000 will be necessary to make it useful for up to 2 more years. Operating cost is expected to be $10,000 the first year and $15,000 the second year, with no salvage value at all. Alternatively, the company can purchase a new machine with an ESL of 7 years, no salvage value, and an equivalent annual cost of $ -55,540 per year. The MARR is 10% per year. Using the estimates above, determine a) When the company should replace the upgraded machine?
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