He telephones Patrick to offer him his third edition of Pollock on contract for RM400. Patrick says that he will think about it and get back to Gan. The following day Patrick telephones Gan and leaves a message on his voicemail to say he will buy the Pollock on contract for RM350 and that he will assume that the book is his at that price unless Gan replies otherwise and that he will collect the book when he sees Gan at the Contract Teachers' Conference next month. Gan listens to the message and puts the book aside to take to the conference. Advise Rina, Ewan, Mindy and Patrick if they have any contractual claims against Gan.