ANSWER:
1) Contract:
aw = 1st cost(a/p,i,n) + annual cost + annual income
aw = 0(a/p,8%,5) - 1 + 2.5
aw = 0 * 0.2505 + 1.5
aw = 0 + 1.5
aw = 1.5
2) License:
aw = 1st cost(a/p,i,n) + annual cost + annual income
aw = -2(a/p,8%,10) - 0.2 + 1.3
aw = -2 * 0.149 + 1.1
aw = -0.298 + 1.1
aw = 0.802
3) IN house:
aw = 1st cost(a/p,i,n) + annual cost + annual income
aw = -20(a/p,8%,infinity) - 4 + 8
aw = -20 * 0.08 + 4
aw = -1.6 + 4
aw = 2.4
since the annual worth of in house personnel is highest , we would recommend man to use in house personnel that is option 3.
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