In: Economics
An industrial engineer is considering two assets to be purchased by a company. Asset A will have an initial cost of $90,000, an annual operating and maintenance cost of $32,000, and a $6,000 salvage value. Asset B will have a first cost of $135,000, an annual operating and maintenance cost of $25,000, and a $17,500 salvage value. Which one should be selected? Use a 15-year study period and an annual interest rate of 8%. Draw the cash flow diagrams. Always use factor notation.
Alternative 1 :
Year | Investment ($) | Annual Expenses ($) | Salvage ($) | PV Factor | PV ($) |
- | -90,000 | 1.000 | |||
1 | -90,000 | -32,000 | 6,000 | 0.926 | 1,07,407.407 |
2 | -90,000 | -32,000 | 6,000 | 0.857 | 99,451.303 |
3 | -90,000 | -32,000 | 6,000 | 0.794 | 92,084.540 |
4 | -90,000 | -32,000 | 6,000 | 0.735 | 85,263.463 |
5 | -90,000 | -32,000 | 6,000 | 0.681 | 78,947.651 |
6 | -90,000 | -32,000 | 6,000 | 0.630 | 73,099.677 |
7 | -90,000 | -32,000 | 6,000 | 0.583 | 67,684.886 |
8 | -90,000 | -32,000 | 6,000 | 0.540 | 62,671.191 |
9 | -90,000 | -32,000 | 6,000 | 0.500 | 58,028.880 |
10 | -90,000 | -32,000 | 6,000 | 0.463 | 53,730.445 |
11 | -90,000 | -32,000 | 6,000 | 0.429 | 49,750.412 |
12 | -90,000 | -32,000 | 6,000 | 0.397 | 46,065.196 |
13 | -90,000 | -32,000 | 6,000 | 0.368 | 42,652.959 |
14 | -90,000 | -32,000 | 6,000 | 0.340 | 39,493.481 |
15 | -90,000 | -32,000 | 6,000 | 0.315 | 36,568.038 |
9,92,899.528 |
Alternative 2 :
Year | Investment ($) | Annual Expenses ($) | Salvage ($) | PV Factor | PV ($) |
- | -1,35,000 | 1.000 | |||
1 | -1,35,000 | -25,000 | 17,500 | 0.926 | 1,31,944.444 |
2 | -1,35,000 | -25,000 | 17,500 | 0.857 | 1,22,170.782 |
3 | -1,35,000 | -25,000 | 17,500 | 0.794 | 1,13,121.094 |
4 | -1,35,000 | -25,000 | 17,500 | 0.735 | 1,04,741.754 |
5 | -1,35,000 | -25,000 | 17,500 | 0.681 | 96,983.106 |
6 | -1,35,000 | -25,000 | 17,500 | 0.630 | 89,799.172 |
7 | -1,35,000 | -25,000 | 17,500 | 0.583 | 83,147.381 |
8 | -1,35,000 | -25,000 | 17,500 | 0.540 | 76,988.316 |
9 | -1,35,000 | -25,000 | 17,500 | 0.500 | 71,285.478 |
10 | -1,35,000 | -25,000 | 17,500 | 0.463 | 66,005.072 |
11 | -1,35,000 | -25,000 | 17,500 | 0.429 | 61,115.807 |
12 | -1,35,000 | -25,000 | 17,500 | 0.397 | 56,588.711 |
13 | -1,35,000 | -25,000 | 17,500 | 0.368 | 52,396.954 |
14 | -1,35,000 | -25,000 | 17,500 | 0.340 | 48,515.698 |
15 | -1,35,000 | -25,000 | 17,500 | 0.315 | 44,921.943 |
12,19,725.713 |
Cash Flow Diagrams for comparison between both alternatives | |||
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