Tom promised to keep the offer open for acceptance by Jerry until 10:30 am the next day, the night Jerry decided to buy the book and left a message on Tom's answering machine. However, Tom finds an email from Susan, which she agrees to buy, and the email has been in Tom's inbox at 9:15 am. Then the book sold to Susan at 10 pm. At 10:30 am, Tom telephoned Jerry and inform them he has sold it to Susan, Jerry told Tom he had left on Tom's answering machine the night before.

The question is to advise Tom regarding his contractual rights and obligations.

Thanks