I can share a situation that I recently encountered? Our G/C paid for sand that was delivered to his jobsite earlier than we were on the job. So I owed that G/C the cost of the sand.
I made a Credit Memo under the Customer-Job (G/C) and applied it to the G/C's Invoice; which placed the cost of the sand in COGS and reduced the amount that the G/C owed to our company. Hope it helps.
