If you order the garden burger off the sandwich menu, it’ll cost $7.25. On the burger menu, a basic hamburger costs $7.25. But a note at the end of the burger menu says that a garden burger patty or a chicken breast can be substituted for an extra fifty cents. That garden burger will cost you $7.75. The menu is still internally consistent: The garden burger on the sandwich menu has onions, lettuce, and tomatoes. The hamburger has all that, plus it has pickles. An “add pickles: 50 cents” note could be added to the sandwich menu for clarification.