This demo represents how to calculate footer totals client-side having RadNumericTextBoxes in
and OnBlur events of RadInput. Additionally, for easy extraction of the input values, the code takes
advantage of the Client-side API of the RadNumericTextBox and its get_value()/set_value(val) methods.
Keep in mind that the changes made by the user will be lost on subsequent postbacks.
If you would like to keep the new entries during the page lifecycle, you will need to pass them
server-side with custom code logic and refresh the grid source accordingly.