Consider a Sale Process Scenario for a cashier processing sale activities in a supermarket. The cashier is required to process any purchasing (sale) activity by the customer. The customer will firstly put their goods on the cash counter. The cashier will then enter the item ID (could be the barcode) and its quantity, so that the system can give the description of the item and total price. The process is repeated until all items are scanned and recorded as sale. The process will end afterwards, and will require the customer to pay the amount indicated.
The Use Case has been thoroughly analyzed and identified below:
1. Cashier starts a new sale.
2. Cashier enters item identifier (should be barcode of item).
3. System records sale item and presents item description, price and running total.
4. Cashier repeats steps 2 to 3 until all items processed.
5. System presents total.
6. Cashier informs the customer the total and asks for payment.
7. Customer pays and System handles payment.
Question: Draw a sequence diagram for this application.
Software Engineering