conversations.from: human
conversations.value: Provide a step by step solution for the following math problem: Mike has to get an x-ray and an MRI.  The x-ray is $250 and the MRI is triple that cost.  Insurance covers 80%.  How much did he pay?
conversations.from: assistant
conversations.value: The MRI cost 250*3=$750
  So between the two things he pays 250+750=$1000
  Insurance covered 1000*.8=$800
  So he had to pay 1000-800=$200