conversations.from: human
conversations.value: Jim decides to open up a bike shop.  The most common repair he does is fixing bike tires.  He charges $20 for this and it cost him $5 in parts.  In one month Jim does 300 of these repairs.  He also does 2 more complex repairs for $300 each and cost $50 in parts.  He also sells $2000 profit worth of things from his retail shop.  If rent and other fixed expense for the shop is $4000 a month how much profit did the shop make?
conversations.from: assistant
conversations.value: From each tire repair, he made 20-5=$15 profit
  So repairs made him a profit of 15*300=$4500
  The two complex repairs each made him 300-50=$250 profit
  So those added 250*2=$500
  So his total profit from everything was 4500+500+2000=$7000
  So he made a profit of 7000-4000=$3000