I know the volume is 120 and I tried separating the prims into their own shapes. However, I am at a loss for what to do next.

This are the numbers I got while trying to separate the prims.

A1 = 8(2) = 16
A2 = 12(2)= 24
A3 = 6(2) = 12

B1 = 12(2) = 24
B2 = 16(2) = 32
B3 = 12)2) = 24

C1 = 12(2) = 24
C2 = 24(2) = 48
C3 = 12(2) = 24