conversations.from: human
conversations.value: Find the answer to the math problem: The Arevalo family went out to dinner. The smoky salmon costs $40, the black burger costs $15, and the chicken katsu costs $25. If the bill includes a 10% service charge and 5% tip, how much change will Mr. Arevalo receive from his $100?
conversations.from: assistant
conversations.value: The total amount spent on food is $40 + $15 + $25 = $80.
  The service charge is $80 x 10/100 = $8.
  The tip is $80 x 5/100 = $4.
  So, Mr. Arevalo had to pay $80 + $8 + $4 = $92 in all.
  Therefore, his change will only be $100 - $92 = $8.