Ok so ... If wood shavings are 500:1 and urine is 1:1 carbon: nitrogen, and one is looking for a 25:1 ratio for good composting, then *hypothetically*, if it were possible to make compost with just these two ingredients, then for a cubic yard of wood shavings, one would need 20 cubic yards of urine (4000 gallons) to get the right balance.
Is my math correct? (Just a thought experiment lol I'm not actually doing this) thanks