Is $8,589 to install LVP flooring throughout the house including stairs a fair price?

I am working through my quote for a full LVP project. After being gaslit, I feel like I am being ripped off on the quote for the stairs in particular. I'm getting quoted at $85 labor per stair. I'm looking for feedback on what a reasonable rate for stair install per stair is. The transitions and moldings are matching the flooring and seem consistently priced based on online listings. The nosing pieces are about 94" and should fit two stairs a piece. There is also a ledge from the kitchen to the family room where they are installing nosing.