甲方案 折旧=210/5=42 现金流量 T0:-200 T1:-10 T2-T6:(100-40-5)*(1-25%)%2B42*25%=51.75 乙方案 折旧=(240%2B14-4)/5=50 现金流量 T0:-240 T1:-20-14=-34 T2:(120-50-7)*(1-25%)%2B50*25%=59.75 T3:(120-50-7-2)*(1-25%)%2B50*25%=58.25 T4:(120-50-7-2*2)*(1-25%)%2B50*25%=56.75 T5:(120-50-7-2*3)*(1-25%)%2B50*25%=55.25 T6:(120-50-7-2*4)*(1-25%)%2B50*25%%2B20%2B4=77.75 (2) 甲净现值=-200-10*(P/F,8%,1)%2B51.75*(P/A,8%,5)*(P/F,8%,1) 乙方案净现值=-240-34/(1%2B8%)%2B59.75/(1%2B8%)^2%2B58.25/(1%2B8%)^3%2B56.75/(1%2B8%)^4%2B55.25/(1%2B8%)^5%2B77.75/(1%2B8%)^6