Formulate a linear programming problem that can be used to solve the following question. An individual needs a daily supplement of at least 320 units of vitamin C and 72 units of vitamin E and agrees to obtain this supplement by eating two foods, I and II. Each ounce of food I contains 34 units of vitamin C and 6 units of vitamin E, while each ounce of food II contains 16 units of vitamin C and also 8 units of vitamin E. The total supplement of these two foods must be at most 30 ounces. Unfortunately, food I contains 13 units of cholesterol per ounce and food II contains 33 units of cholesterol per ounce. Find the appropriate amounts of the two food supplements so that cholesterol is minimized.