conversations.from: human
conversations.value: James goes out to eat.  He orders a steak and egg meal for $16.  He is with his friend, who orders chicken fried steak for $14.  His friend pays for half the bill and James pays the tip along with his half of the bill. They tip 20%.  How much did James pay?
  Solve it.
conversations.from: assistant
conversations.value: The meals cost 16+14=$30
  So each paid 30/2=$15
  James left a tip of 30*.2=$6
  So James paid 15+6=$21