Allen the accountant is Paul the plumber's younger brother. Yesterday, Allen asked Paul how to fix a leaky pipe in his main floor washroom as cheaply as possible. Paul knew that while Allen is a good accountant, he is not good at fixing things. Since Paul knew that Allen had just lost his job and wanting to help him out, Paul volunteered to do the work himself, which took him almost half a day to complete. The next day, Paul and Allen had an argument and in anger Paul sent Allen a bill for his work. Allan refused to pay.