conversations.from: human
conversations.value: Find a solution for this math problem: Kurt's old refrigerator cost $0.85 a day in electricity.  He recently bought a new energy-efficient refrigerator that only cost $0.45 a day in electricity.  How much money does Kurt save in a 30-day month with his new refrigerator?
conversations.from: assistant
conversations.value: The old refrigerator costs $0.85 a day so for 30 days it costs .85*30 = $25.50
  The new refrigerator costs $0.45 a day so for 30 days it costs .45*30 =$13.50
  Over 30 days, Kurt saves 25.50-13.50 = $12.00 a month with his new refrigerator