Adding 2 Columns in Pivot Table to create new Column

Hello,

I have some raw data in Excel that I need to summarize (Figure 1) as shown my pivot table (Figure 2). I then need to add “ADDISON” and “BARBARA” together in the pivot table (Figure 3) so that I can graph the data as shown (Figure 4). How do I add the “ADDISON +BARBARA” in the actual pivot table?

PLEASE HELP!!!

HELP pics.docx

Thanks!!!