conversations.from: human
conversations.value: Find a solution for this math problem: Raphael went to buy some school supplies. He bought 4 pens which cost $1.5 each, 2 notebooks which cost $4 each, and a rim of bond paper which cost $20. How much did Raphael spend on everything?
conversations.from: assistant
conversations.value: Raphael spent 4 x $1.5 = $6 for the pens.
  He also spent 2 x $4 = $8 for the notebooks.
  Therefore, Raphael spent a total of $6 + $8 + $20 = $34 for the school supplies.