The cartoon is a comment on the soaring price of gasoline in the USA, which has seen a 32-cent jump in the past month, and now averages $3.83 nationwide.
1. In American English, gas is short for gasoline, the fuel which is used to drive motor vehicles. In Britain, people use the word petrol.
2. "Any chance" is an informal way of saying "Is there any chance...", i.e., "Is there any possibility..."