When there are less sellers, the demand curve shifts to the right.
As a result, price increases and quantity decreases.
Explanation:
Say there’s two gas stores. One shuts down. The gas store that is still opened will gain all of the shut down gas store’s business. This means there will be a high demand and the curve shifts right. Because of the high demand, there will be a decrease in goods available (quantity decrease). With limited goods, the gas store will have no choice but to raise the price.