If there is no preferred supplier, the Supplier and operations planning (SOP) will choose the supplier with the lowest purchase price:
1. It searches for all prices less than or equal to the required quantity
2. It chooses the supplier (SUP) with the lowest purchase price of the prices in step 1
3. If the purchase quantity is changed, due to minimum order quantity (MOQ) or otherwise, the
price can be changed, but it is still based on the supplier (SUP) chosen in the previous steps
1. If there is a supplier marked as preferred in the Supplier Info folder, they will be added to the purchase order, and receive the forecast generated from the the Supplier and operations planning (SOP).