How do I find out how a public service in a small city is funded?

I would like to find out where the funding comes from for the Arts Council in my small city. I know that some is from donations from local businesses, but how do I find out if there is funding from grants/endowments, and which ones, and how much is taxpayer dollars? I am assuming that the records of this are public.
This is a bit of a stealth mission, there is suspicion of fund mismanagement by the director, I want to avoid attracting any attention.

Jellies with municipal experience, please weigh in!

Thank you.