We would like to link line items in Purchase Orders to different Sales Orders. So for example if we have 3 lines of material that belong to different sales orders, we would like to be able to link each line to the relevant sales order. The goal is to link all relevant purchases to a particular Sales Order to see the profit and loss but not having to create too many purchase orders for one supplier. We usually combine multiple purchase orders into one order to avoid receiving too many bills and to reduce admin work for both us and the supplier.