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I've had a look and found the following: If you have applied for a "Ausbildungs-Duldung"/ suspension of deportation for training purposes (3+2 rule), then an administrative fee of up to €62 will be charged to process the application.
You can find more information on the Berlin-Service website here: https://www.berlin.de/labo/willkommen-in-berlin/service/artikel.776667.en.php
Scroll down to the section "The application has been filed. What happens next?", where you can read about the following steps and the fees you paid.
I hope this information helps! Please reach out to us again if you have any more questions :-)
All the best,