The federal government is considering three sites for mineral extraction in the national wildlife preserve. The cash flow ($ million) associated with each site are given below
Initial cost Annual cost Annual benefits Annual dis-benefits
Site A 50 3 20 0.5
Site B 90 4 29 1.5
Site C 200 6 61 2.1
Using the B-C ratio method, which site (if any) is best for an extraction period of 5 years and interest rate of 10% per year?