conversations.from: human
conversations.value: Jan buys 5 dozen roses.  Each rose cost $6.  Since he bought so many he only needs to pay 80%.  How much did he pay?
  Find the solution.
conversations.from: assistant
conversations.value: He got 5*12=60 roses
  So the cost was 6*60=$360
  So he has to pay 360*.8=$288