You can use https://try.lokad.com to solve this workshop !

Here is the list of available icons : https://docs.lokad.com/reference/list-of-icons/

If you need your column to be in € when the user download the file as an Excel, you can replace
excelformat: "#,##0.00\ [$₽-419]" by
excelformat: "#,##0.00\ [$€-407]"
And for other currencies, $ => [$$-409],
¥ => [$¥-804]
₽ => [$₽-419]
£ => [$£-809]
₺ => [$₺-41F]