Assess students' ability to analyze costs, set prices, and decide on profit for a classroom lemonade stand. Tasks include identifying fixed versus variable costs, calculating total cost and per-unit cost for given ingredient and supply quantities, computing revenue and profit for different selling prices and sales quantities, selecting a price to cover costs and achieve a target profit, and evaluating how changes in costs, price, or number of cups sold affect profit. Problems use whole-number arithmetic and simple percent or per-unit reasoning appropriate for grades 3–5.