This resource guides students through the process of managing a store, focusing on calculating totals from purchases. It introduces core concepts such as subtotal, sales tax, and total amount due, using practical examples like store receipts. Students learn about the Direct Multiplier Method for calculating totals efficiently and the Two-Step Method for accuracy. The resource emphasizes neatness in calculations and provides exercises to practice aligning decimals and double-checking work. Additionally, it encourages students to contemplate varying tax rates and their effects on total cost.