My 81 year old mother has been a loyal Costco customer for many years. She bragged about the superior service at the Henderson -Marks (las vegas)Nevada location. She had not been there in almost a year and wanted to take me there. Several days ago I agreed to accompany her. We completed our shopping and waited for the clerk to ring up our items. I didn't notice the majority of the staff was almost entirely Latino until later. The clerk told my mother she was moving too slow to pay her. She stated other people were waiting. I was very... read full review »