This app simulates the operation of a "lemonade stand"-type business. Each unit of lemonade requires one unit of lemon, one unit of water, and one unit of sugar to produce. Units of lemonade may be sold to simulated consumers. Inventory carryovers are simulated to risk loss and spoilage. Cycles orient by days and are limited to purchasing, production, and sales. This helps the user become familiar with arithmetic operations and quantitative evaluations fundamental to normal business operations.