conversations.from: human
conversations.value: I would love to understand how to solve this problem: Enrico owns a rooster farm, he sells each rooster for $0.50 per kilogram. He was able to sell a 30-kilogram rooster and a 40-kilogram rooster, how much money was he able to earn?
  Can you explain?
conversations.from: assistant
conversations.value: Enrico was able to sell the 30-kilogram rooster for 30 x 0.50 = $15.
  And he was able to sell the 40-kilogram rooster for 40 x 0.50= $20.
  Therefore, he was able to earn $20 + $15 = $35.