Does Not Register All The Registers

(I am working at a baby store that is closing our location, but keeping all other stores open. Because of this, ALL registers are open, with our best cashiers ringing and others bagging, and we still have more than 20 people in each line. It has been a long day, with many stupid people, but this one will forever stick in my mind.)

Me: “Good afternoon! Thanks for waiting. Did you find what you needed?”

Customer: “You know, you should really have more registers open!”

(All I could do was stare blankly at her… Seriously, are you blind?!)