RIVERSIDE (CBSLA.com) — A man in Riverside who went to see an auto mechanic said he was personally offended by what was written on his receipt – and it wasn’t the price.

Customer Ruben Rodriguez said, “I saw the words ‘stupid’ and I just kind of was like, ‘What?’ And I read it and reread it.”

CBS2/KCAL9’s Crystal Cruz confirmed that scribbled at the bottom of the receipt was “customer to stupid to understand normal thinking.”

Rodriguez said it was written by George Fritts, the owner of George Fritts Auto repair in Riverside. He’s quick to point out a grammatical error: Fritts should have used “too” when he wrote “to stupid.”

“That is one of the issues that I pointed out when I went back into the store. And I don’t think he was too excited about that, but I did my best to help him out,” Rodriguez said.

Rodriguez said he was given the “nasty gram” Tuesday when he questioned Fritts about some previous work done to his car: “As you can see on the bottom, it does say customer advised again about keeping oil clean, which I’m not sure how to do that. That was my question.”

“If he has the nerve enough or proud enough to write this on paper then who else has he told and talked to this way. I just felt that if you were treated this way by him he shouldn’t get away with it.”

Cruz spoke with Fritts about his note but the only comment he wanted to say on record was that he stood by his opinion of Rodriguez.