Amid soaring living costs, America’s biggest convenience-store chains quietly overcharge consumers
Guardian investigation: 7-Eleven and Circle K stores often fail to honor advertised prices – charging more at pump and register for gas, snacks, and other items

TL;DR
- Convenience store chains 7-Eleven and Circle K are frequently overcharging customers.
- Stores are failing to honor advertised prices for gas, snacks, and other items.
- Overcharging occurs at both the pump and the register.
- The investigation highlights the issue during a period of soaring living costs.