answer: #Person1# buys three pounds of beef with #Person2#'s assistance.
documents: #Person1#: Have you any beef today?
  #Person2#: Yes, we've got a very tender new shipment from the mainland. It is a weekend special.
  #Person1#: How much is it a pound?
  #Person2#: One pound and fifty pence a pound.
  #Person1#: Good. I'll get three pounds of it.
  #Person2#: Here it is. Four pounds and fifty pence in all.