Let’s say that cube is 4.5’ a side. That’s 91.125 cu ft. Tungsten weighs 1,201.738 lb/cu ft. Which means the cube weighs 109,508.38 lb.

That’s an impressively sturdy floor.

Currently, tungsten is selling at about $340 USD/ton.

The block weighs 54.7542 tons.

So this is indeed a decent prize at $18,616 USD.

All you have to do to claim your prize is get it home.

Edit: corrected to a less whelming but still difficult to transport prize thanks to chiliedogg.