Not the right way to look at it.
The quarter pounder costs the same, whether it’s with or without cheese. You can get it any way you want, with or without certain toppings, but it’s the same price no matter what’s on it.
Correct. See the Subway pricing model wrt the “options”.
Question is though ;if it is the same price with cheese as without, why would you raise the price for extra cheese if the cheese is free?