Please check the attached TRDP file in the Standalone Report Designer
of Telerik Reporting R2 2016
and later. There is also a SWF file (video) that can be previewed in IE browser. The video illustrates how the report was created. If you want to calculate aggregates based on a group or the whole item's data, you can use data functions
which can operate in a given scope.
I hope this helps.
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