New technology or lower costs can shift the supply curve to the right. However, other factors that reduce supply can shift the supply curve to the left.
To supply the need of the high rising products, the stores have to keep INVENTORY, the quantity of goods that a firm has on hand. Without this the store would not be able to supply the costumers with goods
Almost every year, we experience a new FAD, a product that enjoys enormous popularity for a fairly short time. This item becomes the "must-buy" item of the season.
The store that carries the "must-buy" toy of the season experience shortages of this product. Shortage can appear in forms of SEARCH COSTS, the financial and opportunity cost that consumers pay in searching for a product of service.