Contemporary Engineering Economics (6th Edition)
Contemporary Engineering Economics (6th Edition)
6th Edition
ISBN: 9780134105598
Author: Chan S. Park
Publisher: PEARSON
Question
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Chapter 14, Problem 1P

(a):

To determine

Calculate the sunk cost.

(a):

Expert Solution
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Explanation of Solution

Time period is denoted by n and the interest rate is denoted by i. Sunk cost can be calculated as follows.

Sunk cost=Initial costCurrent value=12,0002,000=10,000

Sunk cost is $9,000.

(b):

To determine

Calculate the opportunity cost.

(b):

Expert Solution
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Explanation of Solution

Opportunity cost is equal to the market value of that particular year. Thus, opportunity cost is $2,000. Present worth (PW) can be calculated as follows.

PW=(Opportunity cost+Maintenance cost((1+i)11i(1+i)1))=(2,000+10,000((1+0.15)310.15(1+0.15)3))=24,832

Present worth is $24,832.

(c):

To determine

Calculate the present worth.

(c):

Expert Solution
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Explanation of Solution

Time period is denoted by n and the interest rate is denoted by i. Present worth (PW) can be calculated as follows.

PW=(PriceMachine+Operating cost((1+i)11i(1+i)1)+Salvage vlaue(1(1+i)2))=(15,000+3,000((1+0.15)310.15(1+0.15)3)+5,000(1(1+0.15)3))=18,562

Present worth is $18,562.

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