The contract between Mary and Southbank Leisure Centre has been breached. Consideration is a valuable consideration that may consist of rights, interests, profits, or benefits accruing to one party, or forbearance, detriment, loss, or responsibility given, suffered, or undertaken by the other. In this scenario, Mary paid £180 but according to the agreement, she was only liable to pay £120. A valid consideration need not be adequate but must be sufficient. Remedies for breach of contract include damages intended to restore the injured party to the position they would have been in if the contract had been performed. The measure of damages is that which will compensate for the loss incurred. In this case, Mary fulfilled her part of the contract on time and should have received a sport bag as per the agreement. Southbank Leisure Centre breached the contract by taking £180 from Mary's account and not providing the sport bag.