conversations.from: human
conversations.value: A magazine costs $3 each. Jewel bought 10 magazines to be sold at $3.50 each. How much will be Jewel gain from selling these?
  Give me a clear explanation.
conversations.from: assistant
conversations.value: Jewel's gain for each magazine is $3.50 - $3 = $0.50.
  Thus, her total gain will be $0.50 x 10 = $5.