You are looking for a power unit to run an irrigation pump in your operation. The pump requires 92 horsepower to turn so you know a unit that can produce about 100 horsepower is needed. The pump will operate 2000 hours per year.
The engine has a brake specific fuel consumption (BSFC) value of 0.34 lbs/hp-hr. The manufacturer indicates that based on standard altitude and temperature deratings in addition to the options you specified on the engine, the deratings should be around 22.5%. Calculate the derated BSFC for the engine due to the deratings.