A homeowner is trying to decide with of two furnaces to install to reduce heating costs. Both furnaces have useful lives of 25 years and no salvage value. Furnace A costs $3700 and can be expected to result in $400 savings annually. Furnace B costs $5000 and can be expected to result in $700 savings annually. With the interest rate at 11%, which furnace should the homeowner purchase? Clearly state your answer providing a reason.