Well, the cheapest price, $36 would be the price for a kids breakfast. The most expensive one, $60, would be the price for the adult dinner. And in between is adult breakfast and child and adult lunch and kids dinner.
That's not entirely correct. The way Disney does pricing on the website is to provide a range based on TYPE of restaurant which does not actually reflect the specific restaurant you are looking at. That price range will appear on ALL entries for any fixed price restaurant.
There's currently no situation in which an adult dinner at Crystal Palace would cost $60. But an adult dinner at CRT, also a fixed price restaurant, during peak holiday pricing, might approximate $60. The same price range appears when you look up CRT.
It's difficult to get exact pricing. Disney, as noted, will not provide exact pricing on their website (they likely don't want to update the website every time a price changes; not that they'd do it anyway.) Disney puts up menus to some of its restaurants, but they are always subject to change without notice. They also don't provide menus for buffets. Unofficial websites put up the menus and prices that readers provide to them. If the reader who gave Allears the menu was there during peak pricing for fixed price restaurants the menu will reflect peak pricing.
If you call 407-WDW-DINE they should be able to give you the current price for any specific fixed price restaurant. But that's the current price; it may not necessarily be the price when your trip rolls around, as the price could change tomorrow.
Allears has an August 2011 menu with the adult dinner price as $43.66, but as part of August is under peak pricing this might reflect the peak price, in which case the non-peak price in August would have been $39.66 (subtract the $4 peak surcharge). If that's NOT the peak price, then the peak price would be $47.66. Still not $60.