What's supporting the woman from just walking away? That's no law stating that one has to pay $15 for for an ordered meal that doesn't state its price upfront.
Burger King came down from $5.20 to $5.00. McDonald's went up from $5.00 to $5.80.
Burger King offers a heavier meal. And because the staff are lazy to boil a pot of boiled coffee that they know they can never finish, they will not boil any coffee. Instead, the use the automatic machine to give you Americano, which is $1.00 more than the boiled coffee. Burger King is the best !