Absence of enough quantity of desired quality raw materials, Theleepan Ltd. can manufacture maximum 80 units of product A and 60 units of product B. One unit of product A consumes 5 units and one unit of product B consumes 6 units of this quality raw materials in the manufacture respectively and their profit margins are LKR. 50 and LKR. 80 respectively. Further, product A requires 1 man-day of labour per unit and product B requires 2 man-days of labour per unit. The constraints in operation are: Supply of quality raw material - maximum 600 units for the period
Supply of labour - maximum 160 man-days for the period.

Formulate Lenoir programing model to the above problem and solve it by using the graphical method.