Supply & Demand

Sally has a lemonade stand. It gets cold and starts to rain.

You like to babysit. Lots of families with young kids move into the neighborhood.

You have a new toy. Most of your class went out and bought the same toy.

A pawn shop has an old toy car. The toy car becomes very popular.

A company sells a new item for a high price. Other companies now have that same item to sell