Assume that, in an average month, your sales will include 700 small drinks, 800 large drinks, 900 supplement additions to the drinks

(beyond any free supplements), and 2,000 high-energy snack bars.

First, determine the price you will charge for each product, being realistic about what you believe customers are willing to pay. Then estimate your monthly expenses. Have several people review your estimates to determine if they are realistic. Then calculate your estimated monthly profit or loss.