A方案折旧=20/5=4 NCF0=-20 NCF1-5=(8-3)*0.75%2B4*0.25=4.75 B方案折旧=(24-4)/5=4 NCF0=-24-3=-27 NCF1=(10-4)*0.75%2B4*0.25=5.5 NCF2=(10-4-0.2)*0.75%2B4*0.25=5.35 NCF3=(10-4-0.2*2)*0.75%2B4*0.25=5.2 NCF4=(10-4-0.2*3)*0.75%2B4*0.25=5.05 NCF5=(10-4-0.2*4)*0.75%2B4*0.25%2B3%2B4=11.9 A净现值=-20%2B4.75(P/A 10% 5) B净现值=-27%2B5.5(P/F 10%1)%2B5.35(P/F 10% 2)%2B5.2(P/F 10% 3)%2B5.05(P/F 10% 4)%2B11.9(P/F 10% 5)
