Dollar Tree

I went to the chicago 92nd western location on July 27th 2019 with my mother. As we go to stand in line to go pay it was crowded no cashiers whatsoever only one line open. So they called for backup we go in line and the associate named christi which she said she was the manager of that store. Treated us in a rude and racist way. I don't think thats the way to treat a customer who shops at dollar tree. She with the rest of the customers look and said things to us . I will not go to that locations were we get treated unfair.