Where does the cost post when debrief is on Sub Inventory belonging to OU1 and Slaes Order is in OU2

I've asked this question on the Service Community but thought this community also may be able to help or benefit for the query.

Also, before we get into the query, let me provide a brief explanantion of debrief. Debrief is the process where a field engineer submits his labor, expenses and materials charges that he has used\encountered in fixing the equipment\providing the service. Of interest is the material transaction here for us.

When the field engineer submits the debrief for the material, he also selects the subinventory from which the material is used. And this posts the material transaction to the inventory. There is no shipping process involved. The transaction is Store issue and field service usage in the inventory transaction.