Please be advised you have an unlimited amount of .wav exports that you can do at 441.kHz 16-bit for burning to CD, however outside the full versions of Cubase 7.5, Nuendo 6.5 and Wavelab 8.5, the Mp3 encoder comes only as a demo license with Cubase LE/AI/Elements and Wavelab LE/Elements and Sequel. You will need to purchase the Mp3 upgrade patch to have a full license allowing you to export Mp3’s from inside your application.
*Purchasing this upgrade will give you a 32 character activation code to download the license to your eLicenser will allow you the ability to export in the Audio Mixdown window using the MPEG 1 Layer-3 format which is the same as the Mp3 format.