What's A Good Price To Charge For Spanish Lessons?

I plan to teach Spanish this summer as an extra income idea, I need to figure out everything before I get any clients. What is a good or fair price for me and for those who'll be getting lessons? Please give me some of your ideas. I am a native speaker, so they'd be learning Spanish right. Also, I have previous experience in tutoring a language because I often volunteer in English classes. Thank You