Months ago, I sold a memory card which was the wrong card.
I supplied the client with a credit note, bought them a new card that was compatible and issued a new invoice with a credit.
I created an obsolete inventory expense account and then used inventory write offs to write off the incompatible card as it was not worth sending back. All seemed to be correct as inventory item was written off and customer got credit which was accounted for in next invoice!
However, I have just realised that the inventory write off is showing an amount of zero instead of what it cost me?
What am I doing wrong here?