Which sandwich is the least expensive?

The Sausage Biscuit is the least expensive option among the choices listed, primarily because it contains just two components: a sausage patty and a biscuit. This simplicity in ingredients directly correlates with its lower cost compared to the other sandwiches that include additional items.

The Egg and Cheese Biscuit incorporates an egg and cheese along with a biscuit, which naturally raises the price due to the extra ingredients. The Sausage, Egg, and Cheese Sandwich is even more complex, as it contains all three components: sausage, egg, and cheese, resulting in a higher price point. Lastly, the Bacon, Egg, and Cheese Biscuit features bacon, which is generally a more premium ingredient compared to sausage. The inclusion of multiple ingredients in these other options increases their cost, making the Sausage Biscuit the most economical choice on the menu.