Use an assembly item to bundle products
Often, the retailer creates a bundle to encourage sales, especially toward the end of the school holiday, The Great Singapore Sales or Christmas season. For example, the computer retailer may bundle the computer with a headphone or a wireless mouse; or a sports shoe seller may give away a sports shoe bag if the customer buys a pair of sports shoe from him.
You can create an assembly item, which consists of the bundled products (the Bill of Material, BOM), and uses it in the sales transaction. Since only the assembly item has picked instead of multiple bundled products, it reduces error and improves the Cashier's productivity.
If you have set up the "Auto-Build Whenever Necessary" feature in the item profile, the assembly item automatically built and the products listed in the BOM (Bill of Materials) gets deducted whenever an assembly item has sold. The auto-build process, which is using a "Make Journal" moved the average cost from the BOM to the assembly item and charged it to the Cost of Goods Sold in the sale entry.