conversations.from: human
conversations.value: Mrs. Oaklyn buys handmade rugs at $40 each and sells them at $60 each. If she bought 20 rugs, calculate the profit she will make from selling the rugs.
  Give me a clear explanation.
conversations.from: assistant
conversations.value: Since she buys one rug at $40 and sells it at $60, she makes a profit of $60-$40 = $20
  If she bought 20 rugs at $40 and sold them at $60 each, she made a profit of 20*$20 = $400