Ran a test on industry expenses today. Turns out a size 0 industry still has daily expenses of 20. This makes finding labor costs easier.
Daily Expenses = 20 + (Size * Industry-specific labor cost)
Will update the Industries page once Excel worksheet is done.
EDIT: Ah, krypt. Apparently not. The formula doesn't work for Pullid Camp and Pea Cultivation at Kivi Camp.