Contract rate for RN/CDE to teach classes?

I am an experienced RN/BSN/CDE. I was recently offered some work to teach DM classes and to possibly assist with the process of obtaining AADE certification for this organization. This would be on a contract basis, which I have never done before. Can anyone give me an idea of what an appropriate rate of pay would be for this? Hourly? per class? I really don't have much idea regarding this. Thanks!