I’m sorry this happened and maybe racism was, in fact, involved. But I got an impression that the salesperson was just lazy… I encountered a lack of interest from salesperson many times, and it was towards ALL the customers who entered the store. They just want to do their shift, get paid and go home. Also, maybe the guy ignored your daughter because she was young, and he assumed she won’t buy anything as she may not have money on her? That’s ageism, but it’s not as bad as racism… But I’m leaning towards the laziness theory. Most retail workers don’t get paid sales commission, and some of them don’t care if you buy anything or not.