They're filthy rich, smokin' hot and--hey, did we mention that they're filthy rich and smokin' hot? Heirs to the huge Hilton hotel fortune, Paris and Nicky Hilton take advantage of their wealth, youth and good looks to, well, party nonstop! But did you know they work, too?

This midriff-baring episode of It's Good to Be the Hilton Sisters shows how these sisters blow--and make--their dough. From modeling to acting to design, they're no slouches. Still, they globe-trot like CEOs, rage like rock stars and ooze cash like ATMs. Can you keep up? Find out with a run-down of what kind of money these girls go through.

$550 million: Estimated value of Barron Hilton's fortune.

$28 million: Share of that Hilton fortune that each of the eight kids and 12 grandkids probably gets.

30th: Floor of the Waldorf-Astoria in New York in which Nicky and Paris were raised, in the presidential suite, eating room service for any meal they wanted.

$16,000: Tuition for the private school where they both did their learnin'.

$100: As kids, their weekly allowance, which was usually blown within hours.

13: Paris' age when she got her first credit card.

5: Number of parties Paris had to celebrate her 21st birthday: one each in Tokyo, London, New York, Los Angeles and Las Vegas.

$75,000: On the high end, what each of these parties would cost.

$250,000: Sales, per month, of Nicky's line of handbags.

$185 to $410: What such a bag would cost you.

$60: The average tip the sisters leave on a $200 check at restaurants like Le Cirque.

$300: Cost of Paris' Hello Kitty beach-cruiser bike, which she loves.

$1,000: Cost of the Mystic Tan spray-on treatment that Paris regularly gets.

$500: Price you'd pay for a Juicy sweat suit, like those Nicky and Paris tend to wear.

$10 million: Value of a necklace Nicky took--without permission--from her mother's jewelry case, because she needed something to wear to a costume ball.

A Goat, Some Ferrets and a Small Tiger: What Paris bought on an impulse spree after winning $6,000 in Las Vegas.