折旧=(400-40)/6=60 各年的现金流量依次为 NCF0=-200 NCF1=-200 NCF2=-50 NCF3-7=(400-280)*0.7%2B60*0.3=102 NCF8=102%2B50%2B40=192 净现值=-200-200(P/F10%1)-50(P/F10%2)%2B102(P/A10%5)(P/F10%2)%2B192(P/F10%8) 获利指数=1%2B净现值/(200-200(P/F10%1)-50(P/F10%2)) 内含报酬率净现值为0是折现率 -200-200(P/Fi1)-50(P/Fi2)%2B102(P/Ai5)(P/Fi2)%2B192(P/Fi8) 内插法求i
