You are way off in your guess about the cost! According to the study you yourself linked in another comment, the subsidies are $12.06 per cental, which is 26cen

You are way off in your guess about the cost! According to the study you yourself linked in another comment, the subsidies are $12.06 per cental, which is 26cents per quart. The subsidies are a big part of the margin though (3/4 of it).