I'm trying to display postage in customer's selected currency, in one of the define pages.

It's $15 Australian dollars flat rate, so if an European selects Euros in the currency side box, the postage should automatically change to 7.3 Euros.

Now I've worked out the code below would do the conversion, but it only shows the dollar number i.e. 7.3. How can I display the actual currency (€ or Euro)?
Code:
<?php $amount=15; echo $currencies->value($amount);?>