The association between products and the suppliers from which you purchase those products is specified on the product's detail screen. Each product can have up to three suppliers. Each supplier on the product can have a supplier specific buy price, quantity available, supplier's product ID, lead time, and comments. For example, suppose you order product PXC0102 from two suppliers, AAA Industries and ZZZ Stores. On the product detail screen for PXC01012, you would select AAA Industries in the Supplier 1 field and ZZZ Stores in the Supplier 2 field. If you are charged $12.92 when buying from AAA Industries, you would place that value in Supplier 1 price field. AAA Industries doesn't use your product identifier, PXC0102. On a purchase order, they expect to see the number for the product from their catalog, 999-129-121. You would place the value 999-189-121 in the Supplier 1 product ID field. Similarly you would fill out the information for ZZZ Stores on the Supplier 2 fields.
All the supplier fields for the products are full integrated with Finale import, export, and reporting systems. You call easily import supplier information on tens of thousands of products from Excel if required.