conversations.from: human
conversations.value: Jett bought a cow from the market at $600 and took it to his farm. He spent $20 every day to buy food. He also used $500 to vaccinate and deworm the cow. If he sold the cow for $2500 after 40 days, calculate the profit he made from selling back the cow to the market.
  Give me a detailed solution.
conversations.from: assistant
conversations.value: The total cost of food that the cow ate for the forty days is 40*$20 = $800
  To feed and maintain the health of the cow, the total expenses Jett used is $500+$800 = $1300
  With the expenses, Jett used $1300+$600 = $1900 on the cow.
  If he sold the cow at $2500, Jett made a profit of $2500-$1900 = $600