conversations.from: human
conversations.value: A bead shop sells one set of crystal beads at $9 each and one set of metal beads at $10 each. Nancy buys one set of crystal beads and two sets of metal beads. How much does she spend in all?
conversations.from: assistant
conversations.value: Two sets of metal beads cost 2 x $10 = $20.
  Therefore, Nancy spends $9 + $20 = $29 in all.