The Friday File: Girl Scouts sell about 200 million boxes of cookies/year. At $5/box, that’s $1 billion in sales, more than the annual US sales of Oreos, the best-selling US cookie. Thin Mints are the favorite of 24% of Americans. Samoas/Caramel deLites are next at 16%, while Tagalongs/Peanut Butter Patties are third at 10%. The remaining eight flavors are collectively favored by 29% of the population; 21% have no opinion.