Anonim
Products in EUR but Invoice generated in local converted local currency
This would help a lot, as its a bit odd make the conversion only at the end of the Invoice.
While is good to trade with EUR only, and your prices are listed in EUR, In some countries you need to apply local invoice formats, which prohibit the use of any foreign currency on an invoice.
In this case a conversion is needed, but the EUR values must not be visible at all, only the converted values in the converted currency.