Joe DePinto, CEO of 7-Eleven, was featured on reality TV series Undercover Boss.

The series reveals what happens when CEO disguises as employees of their own companies. He chose to show up as a new employee at several Long Island locations.

“He’s amazed by the amount of coffee we sell,” said Dolores, an 18-year employee of the franchise who knows every customer who walks through the door, has five children, is on dialysis–and has no idea her new hire is her boss undercover.

“That’s why we’re selling 2500 cups of coffee a day,” said DePinto to the cameras. “Not because we have great coffee, but because we have people like Dolores.”