Dynamics NAV / Business Central - What happens to assigned charge items if the original received quantity is partially returned?

• Scenario
• 100 items are purchased for $1 each
• Vendor Invoice is for $100
• duty item charge of $1 is added
• Customs Invoice is for $100
• Cut a cheque and pay customs to clear container
• Final Landed Cost
• $200
• Upon opening the container, we find 20 items damaged
• We contact the vendor, and he gives us a credit for $20
• Problem
• We cannot request a credit from Customs for the $20 duty we have paid on the damaged items
• The $20 value is still sitting in our inventory account
• Solution
• Pass a manual journal to move the value from Inventory to Damages/Writeoffs, (but not applied to any specific line item, as this will affect existing item costs)
• Debit Inv $20
• Credit Damages/Writeoffs $20
• Add original po,receipt,credit numbers as reference on journal