You can now check on your iTunes library if you have the opportunity to move to DRM-free versions. It could cost you up to 0.30 USD/Euro per song, +30% of the cost for an album and 0.6 USD/euro per video clip.
As shown below, such migration to the DRM-free version of your library can be quite expensive, moving rapidly from dozen to hundreds of USD/Euro:
[translation by Linathael]
