What do we think about these prices?

I’m new to braiding my hair and I don’t know what is fair. I have thick 3c hair. I got braided at this place for the first time a few weeks back and i looooved it but I found it kind pricey Given that I got just two French braids with a hair wash. This time I asked for box braids, but I am unsure of what thickness I want so she sent me her prices based on thickness/length. Let me know what you guys think. I’m in California by the way. I would like to add hair and they said that would be $40-$50 extra