Honestly, and this is a wee bit off topic, but try and cut the cashiers a bit of slack, especially this weekend. I am a former associate and I had quit because of the way I was treated by managers and customers.
Open house weekend sucks. Each cashier is responsible for getting at least 50% of the non-members to join, and getting at least 25% of the existing members to upgrade their membership.
And add at least 10 credit card sign ups.. and that's just during ONE shift.
I'm not trying to make excuses, but EVERYONE comes in for their "twice a year" shopping trip to Sam's during Open House weekend- I know the average order I rung up during Fall open house was $500. Most orders are closer to the $200-$250 range. Most cashiers are stuck working open to close on Sunday of open house, and working 10 hour shifts the other days of open house.
Just my $.02
Thanks for the info, but IMHO that is no excuse for poor customer service. We all put up with unpleasant aspects of our jobs and long hours. That is no excuse to snap at a customer.