conversations.from: human
conversations.value: Darrel has 76 quarters, 85 dimes, 20 nickels and 150 pennies.  If he drops all of his money into a coin-counting machine, they will convert his change into dollars for a 10% fee.  How much will he receive after the 10% fee?
  Give me a solution to this problem
conversations.from: assistant
conversations.value: He has 76 quarters so that’s 76*.25 = $19.00
  He has 85 dimes so that’s 85*.10 = $8.50
  He has 20 nickels so that’s 20*.05 = $1.00
  He has 150 pennies so that’s 150*.01 = $1.50
  All total he has 19+8.5+1+1.5 = $30.00
  They charge a 10% fee to count and convert his change into dollars so they will charge him .10*30 = $3.00
  He had $30.00 and they charged him $3.00 in fees so he now has 30-3 = $27.00