Can SAP provide for different pricing at both order and billing..?
Yes. Normally the same pricing procedure from order applies to billing with options to modify certian elements like freight or taxes. But if required a different pricing procedure can be assigned to a billing document type so that completely different pricing can be attained. Pricing is normally based on a combination of sales area + doc pricing procedure + cust pricing procedure. If a different pricing procedure is specified in the billing document types (VOFA) from the preceding sales document type(VOV8) , then a different pricing procedure applies at billing. (as opposed to a pricing procedure that applied at the order document level.