Answer:
The equilibrium quantity will decline. The equilibrium price depends upon the extent of change in demand and supply.
Explanation:
When consumer items go out of style their demand decrease. This causes the demand curve to shift leftwards. At the same time, the production of such items s stopped. This further causes the supply to decrease. The supply curve, as a result, shifts leftwards.
This leftward shift in both demand and supply curve will lead to a decline in the equilibrium quantity. The change in price depends upon the extent of change in demand and supply.