Seriously? This is how you respond on a forum where we come for help or give help?  I don't know why you've responded to me in such an argumentative manner.  If I wasn't clear to begin with you could have asked for clarification. Yes I did quote without credit.  It still doesn't negate the validity of the information.

FYI, of couse I checked the help on SA first. 

If I've read your tone incorrectly, I apologize, but this whole thing has felt like you've been less than helpful and only argumentative.

Since you're already using Sage, a solution would be to create a Provision for Devalued Inventory as a liability and enter the total amount of the inventory valuation write down as a credit to that account and a debit to an expense item, Inventory Devaluation.  Then in future periods absorb the appropriate write-down figure on a line-item basis when sold.  You'll need to maintain an "off-line" record of the write-down and subsequent absorption, of course.  Finicky. 

Since you're already using Sage, a solution would be to create a Provision for Devalued Inventory as a liability and enter the total amount of the inventory valuation write down as a credit to that account and a debit to an expense item, Inventory Devaluation.  Then in future periods absorb the appropriate write-down figure on a line-item basis when sold.  You'll need to maintain an "off-line" record of the write-down and subsequent absorption, of course.  Finicky.