Imagine a hardware shop sells fresh rolled-grass turf (sometimes referred to as 'sod' - see Image 1). Every morning, there's a queue for the turf and the shop runs out of turf within half an hour of opening. Every morning, several queuing shoppers leave the shop without being able to buy any turf. The persistent existence of such queues seems to contradict the basic theory of how prices are determined in a competitive market. What does the theory say should happen in the turf market? Depict with the help of a simple diagram.