An industrial firm received an offer for the supply of two electronic motors, which are being considered to power an industrial hoist. Each motor is capable of providing 150 hp and has a useful life of 10 years. Motor A which has 74% efficiency costs P55,000 and requires a yearly maintenance cost of P4,000. On the other hand, Motor B which has 78% efficiency costs P62,000 and requires a yearly maintenance cost of P6,000. Money is worth 15% and the expected usage of the hoist is 8 hrs per day, 265 days per year. Power cost P5.50 per Kw-hr. Compute for the rate of return