prompt: Troy is thinking of buying a new computer that is worth $80. He has initially saved $50 and plans to sell his old computer for $20. How much more money does he need so he could buy the new computer?
messages.content: Troy is thinking of buying a new computer that is worth $80. He has initially saved $50 and plans to sell his old computer for $20. How much more money does he need so he could buy the new computer?
messages.role: user
messages.content: Troy has $50 + $20 = $<<50+20=70>>70 from his savings and the sales of his old computer.
  Therefore, he still needs $80 - $70 = $<<80-70=10>>10 more to buy the new computer.
  #### 10
messages.role: assistant