Two 70 horsepower motors are being considered for use. If power costs ​$0.18 per​ kWh, and if the interest rate is 15​%, how many hours of operation per year is required to justify the purchase of XYZ...

Two 70 horsepower motors are being considered for use. If power costs ​$0.18 per​ kWh, and if the interest rate is 15​%, how many hours of operation per year is required to justify the purchase of XYZ brand​ motor? (1 HP=0.746 kW) Which motor would you select if the motor is expected to operate 2500 hours per​ year?

Let X = operating hours per year.

Questions;

a. The annual energy cost of electrical power for Motor ABC is ( .... × ​X).
​(Round to three decimal​ places.)

b. The annual energy cost of electrical power for Motor XYZ is $( .... ×​X).
​(Round to three decimal​ places.)

c. Minimum ..... hours of operation per year are required to justify the purchase of XYZ brand motor. ​(Round to the nearest whole​ number.)