You have been cited under § 4.03 of the Public Courtesy Code: Point-of-Sale Unpreparedness
YOU KNEW THIS WAS COMING.
You stood in that line four minutes. Four minutes to find a card, open an app, decide on an order. Instead you arrived at the register astonished — astonished — that payment would be required, and began the search from scratch while the line held its breath.
This is not a fine. There is no fine. Think about what you did.