What is the ruling on selling surplus flour from a bakery owned by my father to cover the expenses of the bakery and the family, knowing that it is government-subsidized flour?

The state supports bakeries with flour to produce cheap bread, and ideally, there should rarely be any surplus. If there is leftover flour, the bakery must inform theating authority so that it is accounted for in the next day's quota, and it is forbidden to sell this subsidized flour. If, despite this, there is a surplus, it must be sold, and the profit from it must be disposed of by spending it on public welfare.