If there is an increase in price of petrol, there would be a movement along the demand curve and a smaller quantity would be bought.
Liquidated Damages: These types of damages are awarded when there is a provision in a contract which states the amount of damages that shall be awarded in the event of a breach. Liquidated damages cannot be used as punishment to a party or to harm the party for the breach.
The type of breach governs the extent of damages that may be recovered. If the breach is a total breach, a plaintiff can recover damages in an amount equal to the sum or value the plaintiff would have received had the contract been fully performed by the defendant, including lost profits.