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A new Australian Tablet Store recently opened to sell iPads and other tablet computing devices. It purchases its tablets directly from the manufacturers. To order tablets, Australian Tablet Store employee submits a purchase order to the manufacturer electronically. Each purchase order could stipulate several different models of tablets from one manufacturer. The manufacturers typically deliver the tablets to the store within two weeks after they receive the purchase order. The Australian Tablet Store pays for each shipment within 30 days after receipt. If there are multiple orders to the same manufacturer, the Tablet Store occasionally combines payments, issuing one check for multiple receipts. All the Australian Tablet Store cheques are drawn on one bank account. On the sale side, Australian Tablet Store sell only iPads directly to the customer from its only outlet located in Melbourne CBD. Each sale needs approximately take 30 minutes and customers often buy more than one product. Each sale is identified with a unique invoice number. Majority customers pay on the counter; however, some customers also ask for credit sale, payable in full within 30 days. Customers sometimes combine payments for multiple sales. You are required to prepare the assignment based on week-2 to week 8 lecture materials and class notes and demonstrate understanding towards the following questions.

1. Draw BPMN activity diagram that describes sales and collection process, payment and payment process.