A
0时点,-60000
1-5年,(68000-50000-60000/5)*75%%2B60000/5=16500
B
0时点,-81000-5000
1年,(80000-54000-80000/5)*75%%2B80000/5=23500
2年,23500-1000*75%=22750
3年,22750-750=22000
4年,22000-750=21250
5年,21250-750%2B1000%2B5000=26500
净现值
-60000%2B16500*(P/A,8%,5)
-86000%2B23500*(P/F,8%,1)%2B22750*(P/F,8%,2)%2B22000*(P/F,8%,3)%2B21250*(P/F,8%,4)%2B26500*(P/F,8%,5)
2020-12-04