Hi Paul,
There is a suppliers purchasing data table - that allows the items that a supplier supplies and prices/lead times/discounts etc to be defined.
See:
http://www.weberp.org/weberp/PurchData.p...D=DVD-CASE
There is documentation at:
http://www.weberp.org/weberp/doc/Manual/...seOrdering
There is not actually much documentation on the setup of purchasing data that I can recall.
Basically, you set up a purchase order for the inventory you wish to purchase, receive it into inventory, and then match off supplier invoices to the goods you've received.
HTH