The estimates shown are for a bridge under consideration for a river crossing. Use the conventional 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 Initial cost, $ 10x106 30x106 Annual M&O, $/year 100,000 90,000 Benefits, $/year 990,000 2,200,000 Disbenefits, $/year, $ 120,000 100,000 Life, years ∞ ∞