Usually in summer, when the huts are open, their hut-keepers provide basic food and drinks as bread, cheese,butter, soups,eggs, salads, barbecue, tea, coffee, wine, grape brandy.
Usually the price (season 2020) of the breakfast is around 3 EUR, of the lunch around 5 EUR, of the dinner around 5-6 EUR.
One beer is up to 3 EUR. The hut-keepers offer lunch pack as well. Usually it costs around 3-4 EUR.
But the choice in every hut varies, as it depends on the possibility to supply the hut.
Your website is fantastic: very clear and lots of information!
But... what I couldn't find were the prices of meals and drinks in the huts? Or does everyone all the food/drinks for all the hiking days in a backpack?