Hi Gomati,
Thank you for your interest in Syncfusion Products.
To display summary value at the end of each grouped row, we need to set ShowCaptionSummaryCells property to false and ShowSummeries property to true as described below:
mainTD.ChildGroupOptions.ShowCaptionSummaryCells = false;
mainTD.ChildGroupOptions.ShowSummaries = true;
Please find the simple sample in the following link:
http://websamples.syncfusion.com/samples/Grid.Web/6.1.0.34/F72592/main.htmPlease let me know if any concerns.
Regards,
Fathima