First of all cordial greetings to you Sir, following the requests that you have submitted, I could say:
1) My format for transcribing format is OpenOficce writer 2014 (the logo is an orange square).
2) With respect to how long could take me to transcribe one podcast of thirty minutes, well that depends of what kind of information it contains, but if it isn't require any technical language, It could take me at least three hours per audio, so if it is in that way I could guarantee three audios per week.
3) The value of each transcription I could quote in five dollars for each podcast.
4) During the time that I stayed in some differents foreign English speaking countries, I have developed an improvement in my listening comprehension skills as well as the grammatical struture of each pronunciation. In the same way in my career I could beef up more those abilities to the point of making an everyday thing in my life.