Some countries use the period character as the thousands separator and the comma character as the decimal separator when formatting currencies.

You can use the format_as_money() function in the Calculated Fields to do this:

Examples:

replace_multiple_characters(format_as_money({{ total_price }}), '{",": ".", ".": ","}')

If the value of "total_price" is "12345.95", this will output: 12.345,95

If you need to add the currency symbol and the currency code, you can do something like this:

"€" + replace_multiple_characters(format_as_money({{ total_price }}), '{",": ".", ".": ","}') + " EUR"

If the value of "total_price" is "12345.95", this will output: €12.345,95 EUR