Amail carrier at the u. s. postal service works on sunday delivering high-priority letters and packages. she can deliver 14 items per hour. the fixed hourly costs (vehicle depreciation, insurance, etc.) equal $47 and the hourly variable costs (time and a half wages, etc.) total $0.90 per item delivered. how much must the u. s. postal service charge for each item delivered in order to break even on sunday deliveries?