I've been trying to keep my food levels balanced and above 1000 units for all my families, and I'm curious about something.

How many units of food for, say the 40 coins you pay for the fruits and veggies? Is it a set amount of units per, say 20 coins paid? Over all... how are the prices set throughout the store?

Also, how many units of food are going to be used in a day? I would imagine it'd vary by family size, but by how much?

Thanks!