Hello Saifulla,
In order to hide the entire formula bar, you can use the k-spreadsheet-action-bar class as a selector and the display:none rule. As for the column and row headers - you can hide it with the k-spreadsheet-row-header and k-spreadsheet-column-header classes:
Here is the modified dojo:
http://dojo.telerik.com/@nenchef/emiSAJUc/3
Regards,
Nencho
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