Calculate the volume of the composite figure made of three stacked rectangular prisms.
A 3D diagram showing three stacked rectangular prisms with dimensions labeled, forming a stepped structure. The base prism is 8 cm by 3 cm by 4 cm, the middle is 6 cm by 2 cm by 2 cm, and the top is 4 cm by 1 cm by 2 cm. The question asks for the total volume in cubic centimeters.