Hi,
I think Float always use a dot instead of a coma because of the decimal of a whole unit, so you need to convert to a string then string split or substring, add your coma and currency sign and rebuild. Like in my loading bar, I use a float text for the number and a string one for the %, and in my float loop I format my text with "Float add" or "Float Multiply" as you wish like in the second pics to get the number of decimal I want but you can't have a coma. If you need to display whole number it's better to use INT instead.
Good luck!