Adding Total count at each collection

Dear Friends of Omeka Community

I would like to add Total count at each collection but I don`t know the way.

This is the sample for as easy understanding :
Please click the link to see the picture
https://drive.google.com/file/d/0B-YzUOnQ2IOjc0pULXloRTE1VFk/view?usp=sharing

I use "Collection Tree" plugins.

Please help me. Thanks you very much.

It sounds like http://omeka.org/forums/topic/add-item-count-int-collection-tree might give what you need.