conversations.from: human
conversations.value: Sasha made 30 chocolate muffins for her school bake sale fundraiser. Melissa made 4 times as many muffins as Sasha, and Tiffany made half of Sasha and Melissa's total number of muffins. If one muffin sold for $4, how much money did Sasha, Melissa, and Tiffany contribute to the fundraiser?
  Give me a clear explanation.
conversations.from: assistant
conversations.value: Melissa made 30 x 4 = 120 muffins
  Together, Melissa and Sasha made 30 + 120 = 150 muffins
  Tiffany made 150/2 = 75 muffins
  Altogether, they made 150 + 75 = 225 muffins
  They contributed 225 x $4 = $900 to the fundraiser