Sometimes an extra $50. It really depends on the breed of dog. Yes I discriminate, and I'm proud of it. Boxer/lab/hunter dogs hair is super wirey and a pain to get out and it takes forever. Golden retriever hair seems to be pretty easy, so I would charge less.
I've found that the best tools for dog hair are the rubber pet hair brush, a lava rock (supposedly its marketed as a dog hair remover but it looks just like a lava rock lol) and duct tape. Along with a strong vacuum, it takes a while but it will come out.
I hate dog hair. I hate it I tell you! I feel your pain,....