1 baker -> 2 mills -> 4 farms
thats the ratio, so, 1 baker + 6 more licences
and the schools are really useless, 500 pumpkins can buy 6 zombies that are way more useful
3 schools produce 36 settlers a day, the mayors itself produces 96
even the mayors production is useless after a certain level, i just count with bread to make the settlers