show it done through excel too

PROBLEM 2 A refinery produces both gasoline and fuel oil and sells gasoline for $1/gallon and fuel oil for $0.90/gallon. The refinery can produce at most 600,000 gallons a day, but must produce at least 2 gallons of fuel oil for every gallon of gasoline. At least 150,000 gallons of fuel oil must be produced each day to meet current demands. How much of each type of fuel should produce to maximize daily profits