How to put freelance transcription in a resume?

Lurker of this sub, and fellow work-from-home humanoid here. Sorry if this kind of post isn't allowed, but I read the rules and think it's okay!

So my question is this. I've started doing some freelance transcription for Rev, and I actually love it. Some of the content to transcribe is really interesting. And I type quickly, so it works out well. Now, how do I go about putting this in a resume? In my current resume, all of my positions have salary listed. Do I list ~$50 an audio hour, or what?

Any advice would be helpful!