I have red about this on The Aviationist. There is definitely a misunderstanding there as the amount of money mentioned would not cover the same amount of F-16s. Where did you find this information by the way?
EDIT: I have found it myself, link to a whole article in polish : http://www.defence24.pl/news_mon-chce-kupic-do-2030-r-64-samoloty-wielozadaniowe-v-tej-generacji . The amount of money is appropriate.