Drill down report with totals

Hi,

We are using SSRS 2005 and Sql server 2005. I have a hierarchical data coming from db as result set:

Given the above data, need to show the report in expanded form

  Type                         ID          Amount

-          - Master1               111        500

                Child1         112          150

                Child2         113          140

                Child3         114           210

                       Child   Total        500

-          - Master2                115          1000

                Child4         116           600

                      Child total            600

I created the above report using the link:

http://www.c-sharpcorner.com/uploadfile/MohanKumar.R/creating-drilldown-hierarchical-report-using-sql-server-reporting-services-2005/

Everything is working fine including + - signs. But I am not able to add total column. Total has to happen only on children and show total. That way user can see if master is equal to children or not.

Please let me know how to do it.

Thanks,

Spunny