91.5 - 79.5 Example #20: Seven mutually exclusive proposals are to be compared by using the benefits/cost criterion. Each project has an expected life of 50 years with negligible salvage value and is to be evaluated with a tax-free interest rate of 10 percent. Data for the projects, in dollars, are as follows: Initial Cost Annual maintenance cost Estimated annual benefits A 150 8 24 B 200 10 30 C 850 50 130 Proposal D 95 10 18 E 500 20 80 F 65 3 1 1 G 310 5 6 4 Develop an incremental B/C ratio analysis, and select the appropriate alternative