A furniture manufacturing company plans to make two roducts, chairs and tables from its available resources of 400 board feet of mahogany lumber and 450 man-hours. A chair requires 5 board feet of lumber and 10 man-hours and yields a profit of Rs. 45, while each table uses 20 board feet of lumber and 15 man-hours and a profit of Rs. 80, Formulate the problem as an LPP to maximize profit.