In JIRA Structure, how can I get total number of Children (Stories) for each Epic and Group?

[Caleb Park]

Hi guys,

I am trying to get the total # of Stories for each Epic and Group in my JIRA Structure.

I could get it for Epics, for I have no idea how to get it for Groups.

Here is what I currently have in my JIRA Structure.

And this is what my Formula looks like:

How can I display the total number of children next to each Group?