conversations.from: human
conversations.value: A school bought pencils and pens. A pencil costs $2.50, while a pen costs $3.50. How much do 38 pencils and 56 pens cost?
  What is the solution?
conversations.from: assistant
conversations.value: The 38 pencils cost $2.5 x 38 = $95.
  The 56 pens cost $3.5 x 56 =$196.
  The total cost of 36 pencils and 56 pens is $95 + $196 = $291.