Incarcerated at 7-11?

I recently switched offices, and to R's delight my new workplace is close to a 7-11. Last week he was hanging out with me because school hadn't yet started, and one afternoon I decided to treat him to a Slurpee.
While we were waiting to pay he was watching the premade breakfast sandwiches and burgers slowly spinning inside their glass case. The case had labels in both English and Spanish: "Sandwiches to go" and "Jale".

"Mommy?" R asked. "Why are those sandwiches in jail?"