What portion of surf lesson income goes to the instructor?!

Let’s say I go to a surf shop at the beach or a surf school and get one hour with a surfing instructor for $100. How much does the instructor get and how much does the shop? My question is what percentage of the income goes to the shop and what percentages goes to the surfing instructor ?
Someone told me it's 10$ (for the surfing instructor ) and 90$ for the surf shop. Is that true? Assuming the surfer does not own any part of the shop.
I live in Southern California.
Thank you!
Someone told me it's 10$ (for the surfing instructor ) and 90$ for the surf shop. Is that true? Assuming the surfer does not own any part of the shop.
I live in Southern California.
Thank you!
