conversations.from: human
conversations.value: Explain how to solve this math problem: The expenditure of Joseph in May was $500. In June, his expenditure was $60 less. How much was his total expenditure for those two months?
conversations.from: assistant
conversations.value: His expenditure in June was $500 - $60 = $440.
  His total expenditure for May and June was $500 + $440 = $940.