Actual Quantity of Line Item in Goods Issue

Hi experts,

I cannot correctly retrieve Actual Quantity of Line Item if the line item includes sub items.

I need to get actual quantity of line item (not detail level) to be used in a calculation.

And I need to get it with after-modify event.

I tried with SiteLogisticsLot.xbo. But the BO structure and the leanoutprocessec.uicomponent (above Goods Issue screen) are really complicated.

Thanks,

Fred