Just to put it into perspective, a CE Large Confectionary which is a 4x3 cost 379 population and produces 2,640 supplies/hr. That makes it cost 31.58 pop/space and 220 supplies/space while the Huge Confectionary cost 34.73 pop/space and 235 supplies/space plus 40 happiness/space, so it produces more supplies per space than any building in the game except the Computer Games Company which is a premium building, needs two-lane roads, and produces less happiness (per space).