Buffalo Bills - Julian

We had a bill of $114, and she took a $30 tip. The menu clearly states a 15% gratuity for parties of five or more, and there were eight of us. We received two separate checks. Everyone ended up tipping $15 each on bills of $61 and $59. The tip should have been calculated at 15% of the total amount, which was around $200 — meaning it should have been $30, not the paltry $17 suggested by her. She refused to acknowledge her mistake, insisting she was right when it was basic math. I asked to speak with the manager several times, but he never came out. After waiting for 10 minutes, I finally gave up. On the other hand, another staff member, Gale, was a bit more polite, but it seemed she didn't fully grasp the situation either. In the end, she removed the entire tip. I told her I was okay with leaving the 15%. Even after the whole childish debacle caused by the blonde, I still wanted to leave a gratuity for acceptable service. But after her outburst, why would I want to give her anything? I can’t understand her behavior. Was it a racial issue? Did she assume we were Hispanic and incapable of doing math? I didn't notice her treating anyone else this way. The food was okay, but I cannot recommend this place based on this appalling service. Our experience with Julian completely ruined our evening.