Please excuse me for the misunderstanding !
On a second read I found that I answered you in the context of RadGridView, rather than of RadTreeListView. Although both controls are very similar ( RadTreeListView is based on RadGridView) ,
unfortunately grouping is not yet supported by RadTreeListView.
However looking at your description , I may suggest to try RadGridView , instead of RadTreeListView. Using the grouping feature of RadGridView a layout similar to yours may be achieved ( e.g. using a GridView with two level grouping - one by region and one by state with the aggregates turned on as described in my previous answer.
If you find trouble implementing this , just let me know and I will prepare a small sample app for you ( using RadGridView).
the Telerik team
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items