AJC.com called the restaurant, and an employee said it costs an extra 80 cents to add cheese to a footlong sandwich.
Kennesaw Mayor Derek Easterling told WSB-TV he was shocked when he found out about the incident.
“‘Are you kidding me?’ was the first thing that popped up in my mind,” Easterling said.
Easterling said McMillian had been a great employee since he started his job in March, but he wouldn’t tolerate this behavior and fired him Tuesday before he was arrested.
His probationary period was scheduled to end next month, Easterling said.
“He misrepresented his position,” Easterling said. “He misrepresented who he is as a person. That bothers me at a different level — not just as mayor, but as a citizen.”
McMillian didn't respond to the news station's request for comment, and the Subway franchise owner and employees would not comment on the incident.