Hi,
This is done using Sales Order Templates - a type of Bill of Material.
If you go to the Debtor account for Regional Customer Pty Ltd, under the Misc section, you will see there is a Order Template assigned to this Debtor. If you want to use this same Order Template on other Debtors, you simply have to assign this same template to those Debtor Accounts.
Alternatively, you can also add the content of a Sales Order Template to a Sales Order on the fly. In the Stock Code field of a Sales Order line, type a . (full stop) followed by the Template Name. Alternatively, type a . (full stop) and press Tab to get a list of BOMs - the Order Template will be one of those listed.
Hope this answers you question.
Regards,
Quintin