I work at a chain gas station / c-store. Being a chain location we run a lot of promotions that sometimes it's hard to keep track of them (Not to brag but that doesn't happen often).
Well one day this lady came in and I rang out her one item like normal and she then became very flustered.
Customer: "Excuse me but you advertised your eggs being $1.89 a dozen and they are ringing up at over $3 a dozen"
Me: "Where did you see us advertise eggs?"
Customer: "Out front on that sign"
We had a yard sign advertising jobs out front but other than that we only advertised fuel prices
Me: "That little white yard sign right there?"
Customer: "NO! Your sign out front. Second down! You see it now!"
Then it finally hit me what she was talking about...
Me: "You mean the sign that says E85, as in Ethanol, a fuel we sell."
Customer: "Well I'm not paying over $3 for a dozen eggs!"