Display sum values in a column

Hi all,

I am trying to display SUM of column values based on same type of ITService's in a separate column.

I have to do SUM of 29 and 38 and display at 67 location based on ITServices. I am not using any grouping on a  column and just a tablix with details.If I use row group on CategoryName's, data doesnt display correctly. So I don't want to create a ROW GROUP on ITServices.

Please help, how can I achieve. Thanks in advance.

Maruthi...