When a customer came to buy goods from the shop. Seller also serves to provide customer service. When customers choose to buy goods It will pay the cashier But if the product in stores It will inquire into the warehouse that have products that customers want to know if it will ask the customer whether to wait or not. If not, it will end up, but if you wait, it will allow customers to pay and retention of customers. Then slip the customer Then wait for 24 hours or one day, by the way, it will be returned to the warehouse they want. The warehouse when prompted, then send the product to the store's shop.