A pyramid has a square base. The side of square is $$12 cm$$ and height of pyramid is $$21 cm$$. The pyramid is cut into 3 parts by 2 cuts parallel to its base. The cuts are at height of $$7 cm$$ and $$14 cm$$ respectively from the base. What is the difference (in $$cm^3$$) in the volume of top most and bottom most part?

A

872

B

944

C

786

D

918