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He and his partner locate restaurants by concentrated student population / bar areas. By the slice -- $3 to $4. By the pizza: $16 to $26, ranging from plain cheese to steak or various types of chicken.

Margins are quite good (I'd rather not disclose w/o permission), but remember demand varies quite a lot by day and hour, plus plummets during the summer when students aren't around.

Well, he has 3 restaurants so I think it's safe to assume he isn't struggling to turn a profit.

"How much does he charge for a pie"

It's a pizza business, not a pie business. Pizzas aren't pies.

"Pizza" is just Italian for "pie".

http://www.etymonline.com/index.php?term=pizza http://dictionary.reference.com/help/faq/language/e02.html

And a hamburger isn't a "sandwich", it's a "burger".

But these distinctions aren't universal. It's easy to see why some people call pizzas pies if you look at variants like "deep pizza" (or "Chicago style pizza").

Essentially you might as well argue whether it's "soda" or "pop".

When referring to a pizza, Americans often use the word "pie".