Superbowl Prices (Eureka)

I'm not a sports fan, don't watch them on TV, but actually did watch the playoffs Sunday night for the Superbowl.
Curious about the cost to see in Superbowl in person I did a quick peek at ticket prices.
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holy shit.
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$9000 clams to watch a football game, in person.
Levi Stadium held 75,000 fans for the playoffs with an average price of about $700 per fan.
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that's a shit load of money.
Imagine that same stadium full of folks that forked over 9K and the figure is scary.
If my poor math is correct, that's 675 million dollars.
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sheesh