As fans cheer on the Atlanta Falcons or visiting San Francisco 49ers during today’s NFC Championship, the mayors of Flowery Branch and Santa Clara, Calif., will be watching with keen interest.A friendly wager has been made between the mayors of the teams’ headquarter cities.If the 49ers win, Santa Clara Mayor Jamie Matthews will receive a case of Wrigley’s chewing gum and Flowery Branch Mayor Mike Miller will have to wear a 49ers jersey during his next city council meeting. Today, a spokesman for the William Wrigley Jr. Co. said in an email the company has offered to up that ante to a year's supply of gum. Wrigley operates a plant in Flowery Branch.If the Falcons win, Miller will receive a gift basket of promotional items from California’s Great American theme park and Matthews will have to don a Falcons jersey when his council meets.According to Miller, the wager came after an interview with the Atlanta newspaper and a phone call from Matthews.“Good luck, win or lose,” Miller said.