2. T he estimates shown are for a bridge under consideration for a river crossing in Wheeling, West Virginia. Use the B/C ratio method at an interest rate of 6% per year to determine which bridge, if either, should be built. East Location West Location 27 x 10 90,000 Initial cost, S Annual M&O, S/year Benefits, S/year Disbenefits, S/year Life, years 11 10. 100,000 990,000 120,000 2,400,000 100,000 1 A rnsulting engineer is currently evaluating four different projects for the utura orth of costs