Formatting a calculated field

Yes, you can using script, example for first column:

procedure Form1_TableGrid1_OnChange (Sender: TObject);
begin
   if Form1.TableGrid1.Columns[0] is TNxNumberColumn then
    begin
        TNxNumberColumn(Form1.TableGrid1.Columns[0]).FormatMask := '#,##0.00';
        TNxNumberColumn(Form1.TableGrid1.Columns[0]).Footer.FormatMask := '#,##0.00';
    end;
end;

Hi Kees,
Attached is the way that I've always formatted columns (and footers and headers).  I'm sure it's not the only way but it's always worked for me (so it's what I stick with!).
A couple of things to mention;
1.  in the tablegrid,  columns start at 0 rather than 1 so vergoeding is actually column3 in your example.
2.  you hadn't actually associated the tablegrid1 'onchange' event with the code in the script.
And apologies but I don't have a 'euro' symbol on my keyboard so you'll have to make do with £ - LOL! (just replace £ in the tablegrid properties( footer settings) and in the script).
Anything not clear, then just drop a message.
Regards,
Derek.