Doctor recommended a diet for Ram ( a sick person) that contain at least 35000 units of vitamins, 55 units of minerals and 1800 calories. Two foods M and N are available at a cost of Rs. 6 and Rs. 5 per unit respectively. One unit of food M contains 200 units of vitamins, 1 unit of minerals and 40 calories, whereas 1 unit of food N contains 100 units of vitamins, 2 units of minerals and 40 calories. Find what combination of foods M and N should be used to have least cost, satisfying the requirements. Make it an LPP and solve it graphically.