Furnace manufactures tables and chairs. Each table and chair must be made entirely out of oak or entirely out of pin A total of 150 board ft of oak and 210 board ft of pine are available table requires either 17 board ft of oak or 30 board ft of pine, and a chair requires either 5 board ft of oak or 13 board ft of pine Each table can be sold for $40 and each chair for $ 15. Formulate an LP that can be used to maximize revenue.