How to invoice shipment cost for consignment fill up

Our customer does a lot of KB order type. For OR -> F2 we are using shipment cost to invoice for shipment cost.

Any suggestions on how to handle it for KB-> LF->F8.

I have changed the copy control rules to have price source as shipment cost for LF->F8. I have even made the item category KBN - billing relevant to delivery.IT does not pick up the shipment cost.i am sure there is a work around for this. Any suggestions would really help

Thanks

susan