telerik:GridNumericColumn - Add negative Number dynamically

[Karthik Kantharaj]

Hi Guys

I am in a requirement of adding numbers in grid dynamically and save
So i used telerik:GridNumericColumn
Now in new requirement they need to add negative values

I saw
http://www.telerik.com/community/forums/aspnet-ajax/grid/gridnumericcolumn-with-negative-value.aspx,
http://demos.telerik.com/aspnet-ajax/grid/examples/client/columnformatting/defaultcs.aspx

Here they display by formatting the existing data , my requirement is to add negative numbers on the run i.e EditMode="InPlace"

Karthik.K