Know? No. It costs Saudi Arabia less than a dollar to pump a barrel of crude out of the sand.
Crude is going for over $100/barrel.
Saudi produces about 10 million barrels of oil A DAY..
To see how much money could be available, do the math...
I saw a figure a couple of years ago that placed the Saudi proselytizing expenditure in THIS country alone at $200 billion. I'm sorry, I can't remember the source.