I have successfully created a Table Frame (the one with the blue colors) which only displays data from visible features in my map frame. I have the desired fields showing - which one of them is an area (square foot). I am trying to understand if there is a way to have this table frame provide a row at the bottom which is a sum of those features for which it displays an area...so I would get a total area. Does that make sense? I tried running a "Summarize" tool for that "LandscapedArea" field, but I do not understand how to 'tie it into' my Table Frame:

I'm hoping there is a setting or check box I am overlooking to get this done and have everything update automatically as new elements are added/modified to the map frame.
Any insight would be greatly appreciated!!!