Average client spend. Do I need to rethink my prices?

Afternoon Geeks.

I need some help ....

Iv just worked out my average client spend over the last 6 months and it works out £17.37 on average.

I'm wondering if my price list needs to reflect this as I'm starting to think my prices are to high to let clients me a chance.

I only rent one treatment room at the back of a subbed floor and Iv lots of completion around me but they are salons. I'm starting to think people may think I'm charging to high for what I am?

I will attach my price...

Average client spend. Do I need to rethink my prices?