An environmentally, friendly 2,800 square-foot green home (99% air tight) the cost about 8% more to construct than a same-sized conventional home. Most green homes can save the 15 percent per year on the energy expenses to cool and heat the living space. For a $250,000 conventional home with a heating and the cooling bill of $3,000 per year, discuss how much would have to be saved in the energy expenses per year to justify the home (e, B-C ratio greater than or equal to one? The discount rate is 10% per year, and the expected life of the home is 30 years?