conversations.from: human
conversations.value: Bert has a garden shop. He buys his products in a warehouse and sells them for $10 more in his shop. From each sale, he has to pay 10% of the value in tax. One day a client came to his shop and bought a barrel for $90. How Much money did Bert make on this sale?
conversations.from: assistant
conversations.value: First, we need to know how much Bert paid for the barrel in the warehouse, and that is 90 - 10 = $80.
  The tax from the sale stands at 10/100 * 90 = $9.
  That means Bert earned 90 - 9 - 80 = $1 on the sale.