A furniture manufacturer produces tables and chairs. Each table and chair must be made entirely out of oak or entirely out of pine. A total of 150 board feet of oak and 210 board feet of pine are available. A table requires either 17 board feet of oak or 30 board feet of pine. A chair requires either 5 board feet of oak or 13 board feet of pine. Each table can be sold for $40, and each chair can be sold for $15. Determine how this furniture manufacturer can maximize its revenue.