The manufacturing procedure needs that oil refineries produce at least 2 gallons of gasoline for each gallon of fuel oil. To fulfill winter demand for fuel oil, at least 3 million gallons a day should be manufactured. Demand for gasoline is no more than 12 million gallons per day. It obtains .25 hour to ship each million gallons of gasoline and 1 hour to ship every million gallons of fuel oil out of warehouse. No more than 6.6 hours are accessible for shipping. If refinery sells gasoline for $1.25 per gallon and fuel oil for $1 per gallon, how much of each must be manufactured to maximize revenue. Determine maximum revenue.