Aggregates and initialize from table

and to add some clarity, I'm looking for something that looks like this but is initialized from a table:

http://dojo.telerik.com/iMuNi

This example shows aggregates, but the grouping aggregates (which I am not interested in). I need to sum at the bottom of the grid

http://dojo.telerik.com/ERAhe/2

Thanks,

--John