It was calculated that a bridge will require $10 million in first costs and $0.5milllion every year

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It was calculated that a bridge will require $10 million in first costs and $0.5milllion every year in maintenance and operating costs. CVM revealed that 2 million people identified themselves as potential bridge users. Average willingness to pay for crossing the bridge was defined as $5 with 1 million potential crossings per year. If we assume infinite time horizon for the bridge, what is the benefit-cost ratio of this project under 5% annual interest