Hi Sujatha,
Thank you for your interest in Syncfusion products.
I am not able to reproduce the issue that you mentioned here. I have created the simple sample with template marker and copy the styles for all the rows and also find the column total. Please refer the sample in the below link:
http://websamples.syncfusion.com/samples/XlsIO.Windows/73800/main.htmPlease have a look at the above sample and if still the issue exists, could you please try reproducing it in the above sample and send us the modified sample so that we could sort out the cause of the issue and provide you a solution?
Regards,
G.Yavana