Hemming saw an advertisement for a Cadillac convertible once owned by the famous early rock ’n’ roll singer Elvis Presley. He contracted to buy it from Whitney for $350,000 and sent Whitney $10,000 as a deposit. But, after some delay, Whitney returned the $10,000 and informed Hemming that the car had been sold to another purchaser. What potential remedy or remedies does Hemming have?