Ch17 Q11 b Show work please thanks

Combat Fire. Inc. manufactures steel cylinders and nozzles for two models of fire extinguishers: (1) a home fire extinguisher and (2) a commercial fire extinguisher. The home model is a high-volume (54,000 units), half-gallon cylinder that holds 2 1/2 pounds of multi purpose dry chemical at 480 PSI. The commercial model is a low-volume (10,200 units). two gallon cylinder that holds 10 pounds of multi-purpose dry chemical at 390 PSI. Both products require 1.5 hours of direct labor for completion. Therefore totalannual direct labor hours are 96,300 or [1.5 hours