Me: “Hello, how are you today? I see you have picked out a lot of our sale items today.”

Customer: “Yes I did! I think these sales are great!”

(I smile as I continue ringing in her items.)

Customer: “Um, this cereal is $1.99, not $2.99.”

Me: “It says right here that this cereal is $2.99. You must just be mistaken with another brand. It can get pretty confusing sometimes.”

Customer: “No, that cereal is $1.99! You’re wrong! I know it is, I saw it like that on the shelf!”

Me: “My apologies, the sign must be for another product. I will call someone to go check–”

Customer: “No! The sign said that this cereal is 1.99! I will go and get it myself for you then!”

Me: “It’s alright, I can just get one of our employees to go and check that for you, there is no need–”

Customer: “I WILL SHOW YOU I AM RIGHT!”

(The customer storms away, leaving me at the speedy checkout with a line of 10 people. She soon returns looking flustered.)

Customer: “Debit, please.”