Hi Nadja,
With your letter, everything except the letterhead should be within the field code. You can see this in the worked example, attachmed to post #13 at:
https://www.msofficeforums.com/mail-...nt-dollar.html.
For what you appear to be trying to do, the field code from the tutorial's 'Using an Extra Field to Generate the Trailing Text Per Group' example seems to be the one to use, as you have totals in columns L and N.