I think it's important for the original poster to understand the difference between Gross, Net, Profit and Costs.
Just because a show grosses (insert figure here) doesn't mean the producers are making anywhere close to that neighborhood.
And there are exceptions to every rule, but a vast majority of shows that make it to Broadway close at a loss.
Now there can be (and has) been a debate on how producers could keep shows open longer and perhaps make their money back. But that's an entirely different matter...
"A little nonsense now and then is relished by the wisest men" - Willy Wonka