Multiple currencies in the report totals
I am afraid that CiviCRM will not provide a lot of features out of the box for multi-currency use. Also, it does not know exchange rates (in fact it only stores the currency and one amount value - not both).

Searches and reports will usually not differentiate between the currencies and (depending on your requirements) you may have to invest quite some time to improve reports &amp; usability.

We thought about doing a exchange rate extension at some point but it is not quite that easy (particularly as they are fluctuating, and may be different when a contribution is created, completed...).

However, apart from the lack of features in the UI, the "currency-information" is stored properly in the database and will allow you to base custom reports &amp; functions on it e.g. using custom reports &amp; searches, drupal views, Civisualize or custom reporting tools such as pentaho.