Change a Supplier (Creditor) of a Costing Line

How to Change the Supplier of a Specific Costing Line

Select the cost line you would like to edit.
Once selected, click on the icon labelled “Select Creditor (Supplier) for Select Cost” [ ] from the Cost/Purchase toolbar.
From here, the system will confirm that you want to clear the existing supplier. Click Yes.
Now you can choose the appropriate creditor from the Creditor Lookup.  
Click OK. The selected cost line now has a new supplier.