Should I tip?

I live in Atlanta and I get my hair braided quarterly (every 3 months)

I get Small knotless braids ($300) with Bohemian add-on ($90) and triangle parts ($40). I'm paying $430 every time I get my hair braided. I tip $70 (16.3%) bringing my grand total to $500.

Should I just pay the $430 since she sets her own prices?