conversations.from: human
conversations.value: Marian's pending credit card balance is $126.00.  She puts $60.00 worth of groceries on her card and half that amount in gas.  She returned some bath towels for $45.00.  What's the new balance on her credit card?
  Work out the solution step by step.
conversations.from: assistant
conversations.value: Her gas is half the price as her $60.00 groceries so that's 60/2 = $30.00 in gas
  Her card has a balance of $126.00 and she added $60.00 in groceries and $30.00 in gas for a total of 126+60+30 = $216.00
  Her balance is $216.00 and she returns $45.00 worth of merchandise for a new balance of 216-45 = $171.00