Inventory Worksheet "Estimated Total Value" Bug

Ok, I tried to do an inventory adjustment but it wouldn't let me set the cost. Instead it was using the average cost of all pieces that were in stock. The piece was discontinued so the price went down for them to get rid of old stock. I knew that the piece that was lost was an old one that we paid $32 for - I was unable to reflect this in the adjustment so I decided to try the inventory adjustment worksheet.

Here, the additional inventory I added today at the lower cost was net yet processed so the numbers were incorrect... although this is not a good thing that it doesn't update, this worked out well for me since I wanted to use the old cost. However, it is showing the "Estimated Total Value" is "0.00" in error. From previous experience I know that this is the net value of the adjustments you make, but it's obviously not calculating right... the line item reads: