conversations.from: human
conversations.value: Find the answer to this math problem: Bert was able to sell 8 toy phones for $18 each, while Tory was able to sell 7 toy guns for $20 each. How much more did Bert earn than Tory?
conversations.from: assistant
conversations.value: Bert was able to earn 8 x $18 = $144 for the toy phones.
  While Tory was able to earn 7 x $20 = $140 for the toy guns.
  Therefore, Bert was able to earn $144 – $140 = $4 more than Tory.