Conservatory transcriber

I work in a conservatory as a transcriber (this is an additional work). This year I have a lot of work and I need someone to work instead of me. so I want worker that can transcribe sheet music sometimes, many of students ask for this kind of job so I can give you a lot of work but I need to know first of all your prices list:) please do your price list per minutes and not per pages.
Indicate even if you:
*Work with musescore (benefit)
*Can transcribe piano
*Arranger
Thank you:)