Rouse Petroleum has spent $200,000 to refine 64,000 gallons of petroleum which can be sold for $6.20 per gallon Alternatively, Rouse can process the further and produce 57,000 cleaner fluid. The additional processing will cost $1.90 per gallon of The cleaner fluid can be sold for $9.20 per gallon. To sell cleaner fluid, Rouse must pay a sales gallons of must pay a sales commission of $0. 14 per gallon and a transportation charge of $0.18 per gallon