2-10. A mail carrier at the U.S. Postal Service works on Sunday delivering high-priority letters and packages. She can deliver 15 items per hour. The fixed hourly costs (vehicle depreciation, insurance, etc.) equal $42 and the hourly variable costs (time and a half wages, etc.) total $0.50 per item delivered. How much must the U.S. Postal Service charge for each item delivered in order to breakeven on Sunday deliveries? (2.2)