By using the multiple currencies feature in the Sales & Receivables application area, you can invoice a customer in an unlimited number of currencies.
You can use this feature to invoice customers that are changing their currency to the euro in both the customers’ old national currency and the euro.
Open the Sales Invoice window.
Press F3, and then press Enter to create a new invoice and give it a number.
Fill in an invoice for a foreign customer.
Note that on the Foreign Trade tab, the program automatically fills in the Currency Code field with the customer’s default currency from the customer card. You can change the contents of the Currency Code field to the currency in which the customer has placed an order, as required.
Post the invoice.
Creating Sales Invoices
Viewing Customer Statistics by Currencies