a) If the interest rate is 10%, what is the economic service life for this machine? b) Repeat (a) above using i=15%.

ENGR.ECONOMIC ANALYSIS
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Chapter1: Making Economics Decisions
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please help with the excel calculation its been my 6 th attmpt but i am not able to find the same answers which is been given by experts when i calculate it on excel. kindly help here

1.
Economic life of the machine is 1 year for both rates. The 3 AE(15) for the machine is:
a. $8610
b. $7383
I
C. $8983
d. $8974
Transcribed Image Text:1. Economic life of the machine is 1 year for both rates. The 3 AE(15) for the machine is: a. $8610 b. $7383 I C. $8983 d. $8974
7.1
A special purpose machine is to be purchased at a cost of $15,000. The following
table shows the expected annual operating and maintenance cost and the salvage
values for each year of service.
Year of
Service
72
2
3
4
5
O&M
Costs
$2,500
3,200
5,300
6,500
7,800
Market
Value
$12,000
8,100
5,200
3,500
0
a) If the interest rate is 10%, what is the economic service life for this machine?
b) Repeat (a) above using i-15%.
I
Transcribed Image Text:7.1 A special purpose machine is to be purchased at a cost of $15,000. The following table shows the expected annual operating and maintenance cost and the salvage values for each year of service. Year of Service 72 2 3 4 5 O&M Costs $2,500 3,200 5,300 6,500 7,800 Market Value $12,000 8,100 5,200 3,500 0 a) If the interest rate is 10%, what is the economic service life for this machine? b) Repeat (a) above using i-15%. I
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