conversations.from: human
conversations.value: Find the answer to this math problem: James gets 3 parking tickets.  The first 2 cost $150 each and the third cost 1/3 as much as one of these.  His roommate agrees to pay half the cost.  How much money does he have left if he had $500 in the bank?
conversations.from: assistant
conversations.value: The third ticket cost $150/3=$50
  So the tickets cost $150*2+$50=$350
  That means he paid $350/2=$175
  So he had $500 - $175 = $325 left over