A 75-hp compressor in a facility that operates at full load for 2500 h a year is

Question:

A 75-hp compressor in a facility that operates at full load for 2500 h a year is powered by an electric motor that has an efficiency of 88 percent. If the unit cost of electricity is $0.06/kWh, the annual electricity cost of this compressor is
(a) $7382
(b) $9900
(c) $12,780
(d) $9533
(e) $8389