I'm also having this issue with my inventory in Quickbooks Online. I suspect that it has to do with the fact that our purchase prices vary quite frequently for the items that we carry in stock depending on the vendor and the manufacturer that we use at the time of purchase. I would very much like to select the item involved and, instead of selecting adjust quantity, select "adjust asset value" so that I can adjust the value of my inventory accordingly. I would want the adjustment to look something like "Dr/Cr Inventory offset by Dr/Cr Inventory Shrink" depending on which way I'm seeing the variance.