Homework Answers
ANSWER:
I = 10%
pw = maintenance cost in year 1(p/a,i,n) + increase in maintenbance cost(p/g,i,n) + salvage value in year 10(p/f,i,n)
pw = - 1,000(p/a,10%,10) - 50(p/g,10%,10) + 100(p/f,10%,10)
pw = -1,000 * 6.145 - 50 * 22.891 + 100 * 0.3855
pw = -6,145 - 1,144.55 + 38.55
pw = -7,251
euac = pw(a/p,i,n)
euac = -7,251(a/p,10%,10)
euac = -7,251 * 0.1627
euac = -1,179.738
so the equivalent annual cost is -$1,179.738
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