"How do you spell that?"
LOL
I complained to the checkout clerk, and she sent me to the store office. I had my receipt and proceeded to explain the error. The manager looked at me and said "I don't understand the problem. We took 10 cents off."
I said, "The sign said 10%."
The manager said to me, "Ten percent IS ten cents."
We went back and forth for several minutes, until I was reduced to teaching per cents to this woman at a grocery office window.
I think she finally gave me the price adjustment to get rid of me. I believe she thought I was making it up. LOL!