I am not clear what you are asking. Can you post a screenshot? To take a screen shot click in the window of interest to bring it to the front. Then type the key combination <COMMAND> + <SHIFT> + 4
the cursor will change to a crosshair. position the cursor at the top-left corner then click and hold, then drag to the bottom-right corner, then release the mouse button.
then return to this forum in your web broswer, click the camer icon in the forum tool bar, navigate to the image (should be on your desktop and will be named something like "Screen Shot 2012-11-27 at 1.01.12 PM.png")
you can make a table that has a single cell (what you are calling a "text field") which other tables may reference.
I do not understand the connection between the top table and the single-cell table (your "text field") and the bottom table.
In the top table there are multiple entries but no mechanism to switch from one to the other. Can you describe how you want the result to work?
Here is a what a single cell table looks like when active:
the upper table is just a sample. In this table I calculate differnt values i.e. an amount to pay, which relies on different other values of cells of the same or other tables (which is easy and not the problem).
Below the table is a textfield to create a "freeform" text (i.e. "The price you have to pay is") and inside this thext I need to reference specfic cells of the table above (i.e. the price).