The winning Powerball ticket for Saturday's drawing was sold at a downtown Indianapolis gift shop, lottery officials said.The single ticket that matched all six numbers was sold at Kanti's Lifestyles, a shop on Monument Circle in the Chase Bank tower."At first I didn't believe it could actually be my store," said Sonny Kheradiya, owner of Kanti's. The store gets $100,000 for selling the winning ticket.The owner of the winning ticket, worth $57.6 million, had not come forward as of early Monday morning.It's not unusual for a large jackpot winner to wait a few days before claiming the prize, lottery officials said. Generally, winners will consult with an attorney and accountant before coming forward."It takes a couple of weeks for people to come in. They like to come in at the end of the day because they don't want to create a fuss," said Kathryn Densborn, executive director of Hoosier Lottery. "We go through a lot of security to make sure they have the winning ticket and that they are who they say they are."The prizewinner can take payment in 30 annual installments or a lump sum amount of more than $30 million. Most people take the cash option.The big prize-winning ticket has been sold in Indiana 35 times, the most of any of the 29 states that take part in Powerball.The owner of the winning ticket must claim the jackpot at Hoosier Lottery headquarters within 180 days of the drawing.