middle school is like 650
and high school is 750 calories at lunch.
there is also restrictions on things like salt, butter and other staples that it takes to actually cook food.
if that was just it then i doubt you would see a problem, but there is more to it that what you posted or better yet didn't post.
there is nothing wrong with whole milk it is way better for you than skim milk that has little nutrion in it.