conversations.from: human
conversations.value: Zane purchases 2 polo shirts from the 40% off rack at the men’s store.  The polo shirts are $50 each at the regular price.  How much did he pay for the shirts?
  Find the solution.
conversations.from: assistant
conversations.value: At regular price, the polo shirts are 2 x $50 = $100.
  At 40% off, he gets a discount of , $100 x 40% = $40.
  With this discount, the polo shirts cost $100 - $40 = $60.