conversations.from: human
conversations.value: Juan and his brother Carlos are selling lemonade. For each gallon they make it costs $3 for lemons and $2 for sugar. They sell each glass for $0.50 and get 20 glasses per gallon. If they made $25 in profit, how much did they spend on lemons?
  Solve this problem.
conversations.from: assistant
conversations.value: Each gallon sells for a total of $10 because 20 x .5 = 10
  Each gallon costs $5 to make because 3 + 2 = 5
  They make $5 off each gallon because 10 - 5 = 5
  They made and sold 5 gallons because 25 / 5 = 5
  They spent $15 on lemons because 5 x 3 = 15