28000 60000 65000 0.892857 25000 53571.429 58035.71
30000 100000 65000 0.797194 23915.82 79719.388 51817.6
40000 120000 65000 0.71178 28471.21 85413.63 46265.72
40000 160000 65000 0.635518 25420.72 01682.89 41308.68
現值率13% 15% 17%凈現值25438 . 56666666667