answer: #Person2# tells #Person1# airmail is more expensive but faster than surface mail. #Person1# decides to send a registered parcel to Australia by airmail.
documents: #Person1#: I'd like to send this parcel to Australia.
  #Person2#: Certainly. Could you put it on the scales, so I can check the weight?
  #Person1#: Sure. It's not very heavy.
  #Person2#: That's 850 grams. The coasts depends on how you would like to send it.
  #Person1#: I see. What are the options? I suppose airmail is faster and more expensive than surface mail.
  #Person2#: That's right. Sending it by airmail will cost twelve dollars and sending it by surface mail will cost eight dollars.
  #Person1#: How long will it take to get there?
  #Person2#: Airmail should take four or five days and surface mail should take about two weeks.
  #Person1#: It that case, I'll send it by airmail. I'd like to send it as a registered parcel.
  #Person2#: No problem. That's one dollar extra.
  #Person1#: Thanks very much. There's thirteen dollars.
  #Person2#: There's you receipt. Goodbye.