Interview transcription Mandarin to Mandarin how much?

Don’t know where to post this question, sorry!

Does anyone have a suggestion about how much it might cost to pay someone to transcribe recordings of interviews that I conducted in Mandarin? Apparently it takes about 3 hours to transcribe a 1 hour interview. It would take me (native English speaker) a lot longer that it would take a Taiwan local, I’m sure! I have about 5 hours of recordings.

What do you think is a reasonable payment in NT$ for an hour’s transcription work?

I appreciate your help.