conversations.from: human
conversations.value: Benny bought  2 soft drinks for$ 4 each and 5 candy bars. He spent a total of 28 dollars. How much did each candy bar cost?
  What is the solution?
conversations.from: assistant
conversations.value: Benny spent 2 * $4 = $8 on soft drinks.
  Benny spent a total of $28 - $8 on soft drinks = $20 on candy bars.
  Benny spent $20 / 5 candy bars = $4 for each candy bar.