On January 1, A and B enter into a contract under which B agrees to renovate A's house by September 1 for $60 000.00. By June 2, B has not yet started the renovations and A is getting worried, so A tells B that he will pay him an extra $5000.00 if B completes the renovations on time. When the job starts, A says, "I'll pay you an extra $5000.00 if you fix that cracked board in my fence. B completes the job by September 1 including the repair to the cracked board .What is the total consideration owed to B? Justify your answer.