conversations.from: human
conversations.value: I'm stuck on this math problem: Sam earns $10 an hour on Math tutoring. For the first month, he earned $200; and for the second month, he earned $150 more than the first month. How many hours did he spend on tutoring for two months?
  Can you help?
conversations.from: assistant
conversations.value: For the second month, Sam earned $200 + $150 = $350.
  So, he earned a total of $200 +$350 = $550 for the first two months.
  Therefore, he spent $550/$10 = 55 hours on math tutoring for the first two months