You just bought a motorcycle for $14,000. You plan to ride the motorcycle for two years, and then sell it for $8,400. During this two-year period, you expect to ride the motorcycle 28,000 miles each year, and you expect the motorcycle to get 50 miles per gallon of gasoline. The annual cost of insurance is $1,960, registration costs are $280 (good for two years), and the price of gasoline is $2.20 per gallon. During this same two-year period, you will