Cracking the code

I think I have deciphered the Starbucks formula:

f(x) = # of shots + size + dairy + specialty beverage + shots

Examples:

a double venti non-fat americano

-OR-

a tall soy no-whip mocha

-OR-

a grande non-fat cinnamon dolce latte with sugar-free syrup

I'm onto you, you green-aproned imps! No longer will you feign superiority over me by haughtily re-arranging the words of my order, verbally excluding me from your clique like some upper-class country club members chuckling at their less couth guest's ignorance of fish forks!