Processing Shipping Cost in Cost Accounting and COGS

Summary

How can I see the Shipping Cost in Cost Accounting and where?

Content

Business Case:

I have a sales order, and create a pick wave, perform pick confirm.  Before I sent the box out, I record shipping costs at the shipment or at the item level.

I confirm the shipment.

Then, the process "Transfer Transactions from Inventory to Costing" is run. And then the Create Cost Accounting Distributions.

I can't seem to see the recorded shipping costs in the costing distributions hence in the margins.

I did not find clear documentation on how these costs captured in the ship confirm can be accounted for in Costing. Any ideas?