For the below ME alternatives , which machine should be selected based on the PW analysis. MARR is 10%.
Machine A | Machine B | Machine C | |
First cost, $ | 15000 | 30000 | 13,435 |
Annual cost, $/year | 16,207 | 6,000 | 4,000 |
Salvage value, $ | 4,000 | 5,000 | 1,000 |
Life, years | 3 | 6 | 2 |
Answer the below questions :
C- PW for machine C =
Machine C:
First Cost = 13,435
Annual cost = 4,000
Salvage = 1,000
Life = 2 years
MARR = 10%
Present value of annual cost of 1st year = [4,000 / (1 + 0.1)^1] = 3,636.364
Present value of annual cost of 2nd year = [4,000 / (1 + 0.1)^2] = 3,305.785
Present value of annual cost of both year = 3,636.364 + 3,305.785 = 6,942.149
Present value of salvage value after 2 years = [Salvage Value / (1 + MARR)^Life] = [1,000 / (1 + 0.1)^2] = 826.44
Present value of machine = Annual Cost - Present value of annual Cost + Salvage Value = 13,435 - 6,942.149 + 826.44 = 7,319.291
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