Hi Naveen,
From the menu, you can view the aggregation fields. From that information, and the content of your Declaration, you should be able to work out whether or not the aggregation is working correctly.
I can't see from your screen-shots how many items there are in the Declaration. Have ANY of them combined together? If so, then the aggregation is working to some extent. If not, then most probably you've missed something.
Regards,
Dave