conversations.from: human
conversations.value: Thomas buys a weight vest.  It weighed 60 pounds and worked well for him in the beginning but after a bit of training he decides he wants to increase the weight by 60%.  The weights come in 2-pound steel ingots.  Each ingot cost $5 and if you buy more than 10 you get a 20% discount.  How much does it cost to get the weight he needs?
  Give me a solution to this problem
conversations.from: assistant
conversations.value: He needs to buy 60*.6=36 pounds
  So he needs to buy 36/2=18 weight plates
  That would cost 18*5=$90
  Since he bought more than 10 he gets a discount so he gets 90*.2=$18 off.
  That means he paid 90-18=$72