conversations.from: human
conversations.value: Can you guide me through solving this problem: Delores has some money. She buys a computer for $400 and a printer for $40. If she has $10 left, how much money, in dollars, did Delores have at first?
conversations.from: assistant
conversations.value: The computer and printer cost 400+40=440 dollars.
  Delores had 440+10=450 dollars at first.