conversations.from: human
conversations.value: John has to pay taxes.  He earned $100,000 for the year.  He has $30,000 in deductions.  The first $20,000 of taxable income is taxed at 10%.  The rest is taxed at 20%.  How much does he pay in taxes?
  Give me a detailed solution.
conversations.from: assistant
conversations.value: His taxable income is 100,000-30,000=$70,000
  So he pays 20,000*.1=$2000 tax at the lower rate
  He has to pay 70,000-20,000=$50,000 at the higher rate
  The taxes for that is 50,000*.2=$10,000
  So his total tax bill is 10,000+2,000=$12,000