conversations.from: human
conversations.value: Can you give me some step-by-step instructions for this math problem: Roe saved $10 per month from January to July and saved $15 per month from August to November. How much should she save in December so she will have a total savings of $150 in the year?
conversations.from: assistant
conversations.value: Since there are 7 months from January to July, then Roe's savings for those months sum up to $10 x 7 = $70.
  Since there are 4 months from August to November, then her savings for those months sum up to $15 x 4 = $60.
  Her total savings from January to November is $70 + $60 = $130.
  Therefore, she needs to save $150 - $130 = $20 in December.