conversations.from: human
conversations.value: Solve the math problem: Roberta takes $158 with her on a shopping trip to the mall. She spends $45 on new shoes, $17 less on a new bag, and a quarter of the price of the bag for lunch. How much money does she have left after these purchases?
conversations.from: assistant
conversations.value: Roberta's bag costs $45 - $17 = $28.
  Roberta spend $28 / 4 = $7 on lunch.
  Roberta spend 45 + 28 + 7 = 80 in total.
  Roberta has $158 - 80 = $78 left.