" If the Item was listed on the purchase, and the item had that account mapping as you now see, then it posts to COGS when it Sells."
Why it posts to COGS when it sells? my understand is it posts to COGS when it purchase from vendor, and it posts to income when it sells to customer. So if I have one item has -10 quantity on hand, I need use adjustment to give "0" new quantity and post to COGS acount, right?

Another situation we have is, sometime we get some parts from damaged machine, we never bought this parts yet, but it can be re-resale, how can i add them to our QB? use adjustment and posts to COGS? how about the cost/value? or i should use items receive without bill?

thank you again