Connecting Customer Shipments with the Carrier Invoice

SOLVED

X3 v6.5 p28

We receive BP Supplier invoices from various trucking companies that ship our products to distributors.  We use dimensions to associate these with a corresponding distributor, but we don't currently have an easy way to connect this transportation expense with a specific shipment.

What I'd like to see is a relationship between a customer order/shipment and the invoice from the carrier -- so I can see the product cost in addition to the transportation cost per shipment.

I'd like to hear form anyone who has figured this out or ideas on how to approach this. I suspect I can add a field to the table to serve as an additional reference, but maybe there is a better way.