Please test adding groups
in the Crosstab item based on the Product Sales video
. The report is available locally with the rest demos installed under C:\Program Files (x86)\Telerik\Reporting <VERSION>\Examples\CSharp|VB\ReportLibrary\Crosstab
More details about the Crosstab item and its structure are available in the following articles:
Let us know if you need any further help.
Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.