Project Cost Refund

We received a refund check and we need to apply the deposit to a project to capture the decreased cost. This is not my wheelhouse, so I’ll post the steps used to get it into the project if it was just a charge we needed to assign. The issue is that Epicor won’t accept a negative number for the unit cost. Is there a way to “remove” material from a project or another way to reverse this cost from the project?

Job Entry Screen
Search on job
Sort by: Part Number
Starting at: PROJxxxx
Job Status: Released
Search
Double click on the project number
Select the ACTIONS menu, Job Details, Material, Add Material
Enter XXX for part/Rev
Type over description with brief description including company & PROJXXXX
Quantity
Unit Cost: Amount of transaction