Localisation rounding makes sense if there is a method of doing calculations with the rounded intermediate values.
Calculation in a no-coding report generation environment implies having an equation editor.
An equation editor could enable selection of variables to be operated on, from a list on Names currently known and in scope.
Selecting valid variables in this manner would greatly simplify user equation entry as the user would no longer need to know what variables were pre defined and available in any particular localisation.
This functionality is very similar to that required for other ideas, so the user interface (and possibly the code) could also be used for