Mason who has a degree in business administration, interviewed for two positions, one as a credit manager for a large bank and the other as a financial planner. He received a phone call offering him the credit manager$$s position, which he accepted. Two days later he was offered the financial planner$$s job, his first choice. He also accepted this position and then called the bank to say he had changed his mind about taking the credit manager$$s position. Has Mason breached a contract with the bank?