Process $1\mathrm{.}0$ Process the sales order

Customers browse the AB Hi$-$Fi online store looking for products to purchase from the product

catalogue. When they have located an item they wish to purchase they click on a $$buy this item'

$436$ Part $3$ Systems in action

link located underneath the item required. The computer displays a screen showing the product

ID number and asks the customer to enter the quantity of the item required. The customer keys

in the quantity required. The computer then displays a screen asking the customer if they want to

continue shopping. Once the customer indicates that they do not want to continue shopping the

computer calculates and displays an order confirmation screen containing the product ID number,

product price, quantity and total cost per item for each different item ordered, the shipping

amount $($AB has a standard shipping rate within Australia of $$10$ per delivery$),$ and a total for all

items and shipping costs. The screen asks the customer to input their credit card and delivery

details to complete the order. The customer inputs the delivery details $($name and address$)$ and

credit card details $($card number and expiry date$)$ to the order confirmation screen. The computer

assigns the next sales order number to the transaction, then displays a screen for the customer

which provides the sales order number and confirms that the order has been completed. The

computer records the sales order details in the sales event data store. At $11$ pm every evening the

computer extracts details of the day$$s sales and updates the inventory levels. The computer prints

a picking ticket $($barcoded sales order number, items and quantities$)$ on the warehouse printer

and produces an electronic credit card check file listing all the credit card details $($customer

name, credit card number and expiry date$)$ from the previous day's sales.