Aged Inventory Report Showing Negatives

SOLVED

I am having trouble understanding the aged inventory report. See the output of one of the items below. If I just looked at the over 730 days column I would think that I had 602 quantity that was over 730 days old. But in fact I have to look at the other columns to then see that it was all sold, due to the negative numbers. This isn't a very easy to read report, and different than most conventional aging reports. Is there any work around or am I reading this wrong, its not very useful.

-------0 To 180Days------- ------181 To 365 Days------ ------366 To 730 Days ------ ------ Over 730 Days ------
Quantity Cost Quantity        Cost Quantity         Cost Quantity Cost
-3.00 -1,278.26 0.00 0.00 -597.00 -258,438.56 602.00 260,569.00