SharePoint | Report Builder | 2 Lists

Need a little help please. I have 2 identical SharePoint lists. (Active & Archive). What I want to do is take a column from each and count them.

If I was just using one list, I understand my steps would be;

1. Open Report Builder, Insert Table and link to my one list (Active) 
2. Select Column (Team)
3. add expression:   =Count(Fields!ID.Value)

My result would be something like 

Team A   5

Team B   2

Team C   1

So I want to do the same using both lists. (Active and Archive) My results should be something like, 

Team A   12

Team B    5

Team C    8

How can I do this?