An electrical energy audit indicates that the motor control center consumption is 8 × 10⁶ kWh/year. By using high-efficiency motors, a savings of 15 percent can be achieved. The additional cost for these motors is about $80,000. Assuming that the average energy charge is $0.08/kWh, is the expenditure justified based on a minimum ROR of 18 percent before taxes? Assume a 20-year life cycle and use the present worth, annual cost, and ROR methods.