Discussion:
A motor capable of delivering 140 HP to steel rolling mill drive is being evaluated in a present economy study. The selected motor will only be utilized for one year, and it will have no market value at the end of the year. Pertinent data are summarized as follows: Motor costs $4,200, requires annual maintenance of $250, and operates with 86 percent efficiency. If electric power costs $0.1 and the motor will be operated 2,000 hours per year, what is the annual expense for the motor (purchase cost, maintenance, plus electric power consumption)? (Enter your answer as a number without the dollar sign.)