conversations.from: human
conversations.value: Can you explain how to solve this math problem: Chad has 100 apples and each apple has different sizes and different price ranges. Each small apple cost $1.5, medium apple cost $2, and big apples cost $3. If Donny bought 6 small and medium apples and also 8 big apples, how much will Donny have to pay for all of it?
conversations.from: assistant
conversations.value: Donny was charged $1.5 x 6 = $9 for the small apples.
  He was charged $2 x 6 = $12 for the medium apples.
  And he was also charged $8 x 3 = $24 for the big apples.
  Therefore, Donny has to pay $9 + $12 + $24 = $45 for all the apples.