In: Finance
A machine cost $30,000 initially and has no salvage value. The O&M costs in year 1 were $10,000 and have been increasing by $2,000 from year 2. The minimum cost life of this machine for a MARR of 10 %. (show your solution)
A. 4 years
B. 2 years
C. 6 years
D. None of above
C 6 years
| Year | Initial cost | O&M | 1 | 2 | 3 | 4 | 5 | 6 |
| 0 | -30000 | -30000 | -30000 | -30000 | -30000 | -30000 | -30000 | |
| 1 | -10000 | -10000 | -10000 | -10000 | -10000 | -10000 | -10000 | |
| 2 | -12000 | -12000 | -12000 | -12000 | -12000 | -12000 | ||
| 3 | -14000 | -14000 | -14000 | -14000 | -14000 | |||
| 4 | -16000 | -16000 | -16000 | -16000 | ||||
| 5 | -18000 | -18000 | -18000 | |||||
| 6 | -20000 | -20000 | ||||||
| NPV | -39090.91 | -49008.26 | -59526.67 | -70454.89 | -81631.47 | -92920.95 | ||
| EUAC | $43,000.00 | $28,238.10 | $23,936.56 | $22,226.46 | $21,534.18 | $21,335.34 |
FORMULAE
