conversations.from: human
conversations.value: John buys game loot boxes for $5 each.  The average value of items inside is $3.5.   He spends $40 on loot boxes.  What is the average amount he lost?
conversations.from: assistant
conversations.value: He bought 40/5=8 boxes
  He loses an average of 5-3.5=$1.50 per box
  So he loses an average of 1.5*8=$12