conversations.from: human
conversations.value: Dirk sells amulets at a Ren Faire.  He sells for 2 days and each day he sells 25 amulets.  Each amulet sells for 40 dollars and they cost him 30 dollars to make.  If he has to give 10% of his revenue to the faire, how much profit did he make?
  Can you solve this problem?
conversations.from: assistant
conversations.value: He sold 2*25=50 amulets
  So he made 40*50=$2000
  The faire took 2000*.1=$200
  So he kept 2000-200=$1800
  The amulets cost 50*30=$1500 to make
  So he had a profit of 1800-1500=$300