Soda's sold at a Little League Football Game
Before the football game we started out with zero soda's. We had bought 10 soda's to start with. During the first half people had bought 5 soda's, the number of sodas had decreased. Then no one had bought anymore soda's because the home team was losing and most of the fans had left. So, the number of soda's stayed constant for the rest of the game.