conversations.from: human
conversations.value: Provide a step by step solution for the following math problem: James decides to sell 80% of his toys.  He bought them for $20 each and sells them for $30 each.  If he had 200 toys how much more money did he have compared to before he bought them?
conversations.from: assistant
conversations.value: He bought all the toys for 20*200=$4000
  He sold 200*.8=160 toys
  He made 160*30=$4800 from selling them
  So he profits 4800-4000=$800 profit