I've been asked to do a voice over piece, as in narration for the introduction of a documentary. I am unsure as to how to price this work, which will be just about 3 minutes in duration. Is $50.00 an hour fair (it's what I charge for other vocal work) or is there another pricing scale for this kind of work?Thanks in advance to anyone who had done this kind of work...I'm used to doing radio traile…