In SO-I, shipped lines, the "Qty Left" column does not do the math properly.  You can see in the attached image that it takes the Orig Qty and Subtracts the Ship Qty.  However, Qty Left should be a running total of what's left.  In the screen shot, the bottom 3 lines should be -47, -46, and -38 for Qty Left.
 

 
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DBA Classic 2004.1 w/ISTS 05/17/11.