Adam is the religious leader of the religion that Bob and Carol practice. They
want to get married so they ask him to perform the ceremony. He agrees after telling
them that he takes such duties very seriously and spends a lot of time and effort
writing a sermon, thinking about the couple's particular personalities and preparing
some materials he likes to give to the couple. He also tells them that the charge
for his service is $ 2,000 and they agree. The morning of the ceremony, Bob and
Carol have a huge argument and cancel their wedding. Adam demands his $ 2,000 for
everything he has prepared but they refuse to pay, saying that they agreed to pay
him the money for marrying them, which he was not going to do. How could Adam have
avoided this mess?