Billing the shipment cost to the customer Invoice

In the Solution TM-ECC, the Freight cost are easily calculated from the moment that The Freight settlement document is transferred to ECC where the PO and SES will be created.

This means that no shipment cost document are created as in Standard SAP LES. In the SAP LES solution,  the shipment costs that are billed to the customer are based on the actual shipments costs that were calculated in the shipment cost document.

How do you add the real  shipment cost on your Customer invoice?

Thanks for your experience feedback!

Kr,

JP