4. The liquid portion of a diet is to provide at least 360 calories, 48 units of vitamin A, and 60 units of vitamin C daily. A cup of dietary drink X provides 60 calories, 12 units of vitamin A, and...

Extracted text: 4. The liquid portion of a diet is to provide at least 360 calories, 48 units of vitamin A, and 60 units of vitamin C daily. A cup of dietary drink X provides 60 calories, 12 units of vitamin A, and 10 units of vitamin C. A cup of dietary drink Y provides 60 calories, 6 units of vitamin A, and 30 units of vitamin C. Now, assume that dietary drink X costs $0.15 per cup and drink Y costs $0.12 per cup. How many cups of each drink should be consumed each day to minimize the cost and still meet the daily requirements?