conversations.from: human
conversations.value: Solve the following math problem: Barbara went shopping in a supermarket. She bought 5 packs of tuna for $2 each and 4 bottles of water for $1.5 each. In total, she paid $56 for her shopping. How much did Barbara spend on different than the mentioned goods?
conversations.from: assistant
conversations.value: For the tuna Barbara needed to pay 5 * 2 = $10.
  For the four bottles of water, she needed to pay 4 * 1.5 = $6.
  On different goods Barbara spend 56 - 10 - 6 = $40.