 On introduction, Trigger acknowledges to Del that he is already acquainted with his brother Rodney but then immediately calls him 'Dave'.Del negotiates the price of the briefcases down from £17 to £8, and intends cheating his friend by claiming the price for the 25 is £175, when actually it is £200.Rodney, however using his GCE in mathematics as proof of his credibility, proves to Trigger that Del's figures are wrong.