I created a Summarized report in order to count a data column called QTY.

I also put in a drill down to show the QTY for each submission.

When I view the report I see a QTY of 2, but when I click on the drill down I see 2 submissions of 16 each. This means it is not counting QTY, but instead counting Instances. If I wanted to just count instances I would choose Instance ID as my data to count. How do I summarize over the QTY data?