A 4000 lbf conventionsl vehicle gets 19 MPG. A 4000 lbf hybrid gets 31 MPG. All other things being equal (maintenance, insurance, other costs), using this analysis how much more would you save using a hybrid. Assume that the vehicle will last 10 years, you will drive it 18,000 miles per year and the price of gas is a constant 4.50 per gallon during that time.