WhilePrintingRecords;
NumberVar Qty;

Qty:= Qty + Sum ({IMINVTRX.quantity}, {IMINVTRX.item_no})

This next section fails :

WhilePrintingRecords;
Numbervar Pct;
//Pct:=PercentOfSum (Sum ({IMINVTRX.quantity}, {IMINVTRX.item_no}), Sum ({IMINVTRX.quantity}))
//Pct:=Sum ({IMINVTRX.quantity}, {IMINVTRX.item_no})/Sum ({IMINVTRX.quantity})

What I am trying to accomplish is a running total by group followed by the percentage of the group total to grand total:

Group 1    Running Ttl 100 10%
Group 2    Running Ttl 250 25% etc etc

Both of the lines marked "//" failed.

Please advise...I don't have any more hair to pull out trying to do this

Unfortunately that is giving me the percentage of the group total to the grand total.

I am looking for the running total percentage to total quantity.

I have a list of 1,000 purchased items of various quantities purchased YTD. I want to follow the 80/20 rule and analyze 80% of the total quantity purchased. That may be the first 10 items, 15 items, or 30 items so I am using the running total to add the quantities and they compute the 80% of quantity purchased.

thank you for your help