Here's a good analogy: NYC Cabs charge $2 per mile while their driving. So a 20 mile trip costs $40. But you're arguing that since the car gets 20 miles per

Here's a good analogy: NYC Cabs charge $2 per mile while their driving. So a 20 mile trip costs $40. But you're arguing that since the car gets 20 miles per gallon of gas, it should only cost $4.