Hello,
I am not a German native speaker but I have studied the German language for more than 12 years in school, and on my report card German is listed as mother tongue because all the classes I took were in German. So I can handle the German language both audio and written.
The translation to English part will be the easiest since I am a fan of the English language, having won several literature contests in this language. I am hoping you consider me for this job. The number of days that it will take me to finish this is not exactly a fixed date. If I can manage to finish it faster I will. It depends on the content of the tapes. Thank you.