answer: #Person1# checks #Person2#'s boarding certificates and charges 120 HKD of #Person2#'s excess baggage.
documents: #Person1#: May I see your airplane ticket, passport and health certificate please?
  #Person2#: Here you are.
  #Person1#: Will you please put all your luggage on the scale?
  #Person2#: I want to check these three pieces and I'll carry this overnight bag by myself.
  #Person1#: Sir, your bags are 30 pounds over weight. You are allowed only 45 pounds of baggage.
  #Person2#: Well, then, how much do I owe you?
  #Person1#: That comes to H. K. $ 120.