Peter wants to go on a crash diet and needs your help in designing a lunch menu. The menu is to include two items: soup and salad. The vitamin units (milligrams) and calorie counts in each ounce of soup and salad are given below. Soup 1 unit of vitamin a, 3 units of vitamin b and 50 calories. Salad 1 unit of vitamin a, 2 units of vitamin b and 40 calories. The menu must provide at least 10 units of vitamin A and 24 units of vitamin C. Find the number of ounces of each item in the menu needed to provide the required minimum vitamins with the fewest number of calories