if col E show qty will auto fill series in col a ,
if qty in col E shown #na col A will not fill up the series number
ItemPart NumberDescriptionQuantity ab123aaa#N/A ab124hhh#N/A1ab125ccc10 ab126ddd#N/A2ab127eee12 ab128fff#N/A3ab129ggg15 ab130hhh#N/A ab131iiii#N/A4ab132jjjj16 ab133kkkk#N/A
if qty in col E shown #na col A will not fill up the series number
ItemPart NumberDescriptionQuantity ab123aaa#N/A ab124hhh#N/A1ab125ccc10 ab126ddd#N/A2ab127eee12 ab128fff#N/A3ab129ggg15 ab130hhh#N/A ab131iiii#N/A4ab132jjjj16 ab133kkkk#N/A