conversations.from: human
conversations.value: Albert wants a paintbrush that costs $1.50, a set of paints that costs $4.35, and a wooden easel that costs $12.65. Albert already has $6.50. How much more money does Albert need?
  What is the solution?
conversations.from: assistant
conversations.value: The total cost of the paintbrush, the paints, and the wooden easel is $1.50 + $4.35 + $12.65 = $18.50.
  Albert needs $18.50 − $6.50 = $12 more.