W.H. must make a decision about spending $100 to fix his old water heater. It is an electric unit and costs him $125 a year to provide his home with hot water. His other option is to buy a new gas water water for $350. The new heater will save 40% on yearly operating costs. If he sells his house 3 years from now, should he buy the new heater? use break-even point method to justify answer.