Buongiòrno!
Do you want near-perfect accuracy in your transcription?
You've looked at the right bidder.
Being a 64-year-old American transcription expert and having had ten years experience while being the chief transcription editor/proofreader for three large American-based transcription companies, I'd say you have the option here to choose the best for your project.
Generally transcription fees are based on Audio Hours or portion thereof, but you have injected Per Hour in your Project Description, so the equivalency of $12 per Working Hour would be close to accurate. My per Audio Hour fees are usually $45 and a typical Hour Audio would take about 5 hours to transcribe, edit and proof accordingly.
If I offer what you're looking for, kindly contact me for more discussion and time frames.
Good luck with your project,
Sincerely,
Scott
TheTranscriptionMagician