conversations.from: human
conversations.value: Nina wants to give presents to her children. She buys three toys at $10 each, two packs of basketball cards at $5 each,  and five shirts at $6 each. How much does she spend in all?
  Solve this problem.
conversations.from: assistant
conversations.value: Three toys cost 3 x $10 = $30.
  Two packs of basketball cards cost 2 x $5 = $10.
  And, five shirts cost 5 x $6 = $30.
  Therefore, Nina spends a total of $30 + $10 + $30 = $70 in all.