Answer:
489 1/2 cm
Explanation:
So, the best first step is to break the complex shape into two smaller ones. I suggest breaking it down into 5 1/2 x 1 1/2 x 5 1/2 ( the smaller shape) and 9 1/2 x 5 1/2 x 8 1/2 (I got 8 1/2 but subtracting 5 1/2 from 14, I can elaborate if you need to). After that, just multiply and add. The first shape gives you 45 3/8. The second shape gets you 444 1/8. If you add them together, they give you 489 4/8 cm, simplified 489 1/2 cm.
(Tell me if this is incorrect)
Hope this helps!