Sum of multiple tables in field

[ReachAndre]

Hello all,
I am trying to return the sum of multiple tables. Attached is a DWG of what Im trying to do.
In the DWG I am trying to accomplish A+B= C
Thank you all for your help in advance,
Andre

P.S. does anyone know how to move a thread to another group? this thread should be elswhere.

[ccowgill]

right click in the table, insert field, scroll down to formula, click cell, click the cell you want, type + click on cell, select the cell you want, click ok, that is how I got it, I dont know how to do it globally, or on multiple tables without using these same steps over and over