Same thing happened to me around the same time. Worked at checkers, Mexican boss asked Mexican kid to mop, I was on drive through, he was standing around, and says in Spanish make the gringo do it. She looked at me and told me she needs me to mop. I would have done it if she asked me to do it initially, but not like that, I said nhaa and walked out. Got a better high school job bussing like two days later with pretty much all white people it was the first time I noticed I preferred to work with and around other white people.