Disposition question

Hi,

1.If I am using Movement and disposition for incoming material routing application, When I received material, which is yet to hit on hand stock and In disposed I put some quantity is in Rework and incurred some cost in repair.

After repair is done , I have reversed Disposition and took material back in inspection. If this is ok I am moving it to stock.

Now, How can I debit this cost to supplier?

2. If material is to be returned and I am not taking it in stock, How can it be retured. I understand credit order can not be created as material is not updated in stock.