... a way to alter this if it changes) 8. Calculate the overall cost for the invoice (check it is within the client's credit limit and generate an error message if not) 9. Include a way to process or abort the order 3. Produce an Invoice 1. Generate an invoice from the information input in 2 2. Print out the invoice 3. Update the customer current balance to reflect the new order 4. Update the stock to reflect what has been sold 5. Clear out data from order form ready for next order 4. Update Information 1. Update stock quantity when new stock arrives 2. Update customer current balance when an invoice is paid 5. Produce Required Output 1. Display/print out labels for selected customers - name, address, postcode 2. Display data about a current stock item by entering the code. 3. Display/print out a current stock list with values 4. Display graphs, eg Customer balances, stock quantities 5. Display and print invoices - see 3.1 B - ...

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