You are in the market for a new refrigerator for your companys lounge, and you have narrowed the search down to two models. The energy efficient model sells for $500 and will save you $25 at the end of each of the next five years in electricity costs. The standard model has features similar to the energy efficient model but provides no future saving in electricity costs. It is priced at only $400. Assuming your opportunity cost of funds is 5 per cent, which refrigerator should you purchase?