I’m not sure what’s confusing here. You pay exactly the price you see on the menu.

(Plus ~10% tax based on which state and town/city you’re in. Plus ~15-20% tip. Plus sometimes a mantatory “gratuity” or whatever they’re calling it. Plus parking sometimes, unless you remember to validate it if the place supports that. Look it’s a lot of random things and even I can’t keep track of it anymore.)