Protein Supplements Exercises are based on the following data on three...

Protein Supplements Exercises are based on the following data on three popular protein supplements. (Figures shown correspond to a single serving.)

You are thinking of combining Muscle Milk and Pure Whey Protein Stack to obtain a supply that provides exactly 640 grams of protein and 3,200 mg of sodium. How many servings of each supplement should you combine in order to meet your requirements? What will it cost?