Comfort-by-Design Furniture produces chairs and sofas. Each chair requires 20 ft of wood, 1 lb of foam rubber, and 2 yd² of fabric. Each sofa requires 100 ft of wood, 50 lb of foam rubber, and 20 yd²  of fabric. The manufacturer has in stock 1900 ft of wood, 500 lb of foam rubber, and 240 yd² of fabric. The chairs can be sold for $200 each and the sofas for $750 each. Assume that all that are made are sold. How many of each should be produced in order to maximize income? What is the maximum income?