A $20 scratch-off ticket revealed a $1 million lottery prize for a customer at a Shop 'n Save grocery store.Pennsylvania Lottery officials said a winning ticket in the $1,000,000 Game was sold at the store on West Beau Street in Washington.The store gets a $5,000 bonus for selling the winning ticket.The lottery says scratch-offs are distributed at random, meaning officials and retailers don't know where winning tickets will be sold. The lottery learns where a winning ticket was sold only after a prize has been claimed.