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× What are the Functions of Levers, Wedges, and Inclined Planes? $225.00
$225.00
× How are Lenses used in Telescopes? $225.00
$225.00
× How are Energy and Motion Related? $225.00
$225.00
× What Holds Us Up $225.00
$225.00

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Subtotal $900.00
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Total $990.00