conversations.from: human
conversations.value: Kate saved $27 in March. She saved $13 in April and $28 in May. Then Kate spent $49 on a keyboard and $5 on a mouse. How much money does Kate have left?
conversations.from: assistant
conversations.value: The total amount of money saved is $27 + $13 + $28 = $68.
  The total cost of the two products is $49 + $5 = $54.
  Kate has $68 − $54 = $14 left.