running sum?

T

TCI Dawn

Hello,
I am constructing a database for work. Sales orders.
I am having a problem creating a report for the Packing List.
The packing list contains QTY ORDERED, QTY SHIPPED, QTY BACK ORDERED AND QTY
PREVIOULY SHIPPED.
How can I generate the QTY PREVIOULY SHIPPED.
I am at a loss - very new to access databases.

Please Help - Dawn
 
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