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?
Melissa made 30 x 4 = 
<gadget id="calculator">30*4</gadget>
<output>120</output>
120 muffins.
Together, Melissa and Sasha made 30 + 120 = 
<gadget id="calculator">30+120</gadget>
<output>150</output>
150 muffins.
Tiffany made 150/2 = 
<gadget id="calculator">150/2</gadget>
<output>75</output>
75 muffins.
Altogether, they made 150 + 75 = 
<gadget id="calculator">150+75</gadget>
<output>225</output>
225 muffins.
They contributed 225 x $4 = $
<gadget id="calculator">225*4</gadget>
<output>900</output>
900 to the fundraiser.

<result>900</result>