How to read output modifiers?

How do I read the generation modifiers for a certain resource like catnip? I am trying to optimise the number of villagers placed in farming. When hovering over the output, I see:

Base:
Weather:
*Village:
*Upgrade:
Buildings:
Demand:

To what order are these modifiers applied? I am assuming that the Upgrades only affect the village output, and the Weather only affect base output. So then how does the buildings affect the output? Does it affect overall, Village or only base output?

Also, what does the * beside Village and Upgrade mean?