conversations.from: human
conversations.value: I would love to understand how to solve this problem: Tina saved $27 in June, $14 in July, and $21 in August. Then Tina spent $5 on books and $17 on new shoes. How much money does Tina have left?
  Can you explain?
conversations.from: assistant
conversations.value: The total amount of money saved is $27 + $14 + $21 = $62.
  The total amount spent on books and new shoes is $5 + $17 = $22.
  Tina has $62 − $22 = $40 left.