[Michlib-l] Operating Costs per hour

Hi everyone, I have another question. We are considering shifting our hours of operation, and in doing so I'd like to determine how much it costs to be open per hour. I know that I could get a rough estimate using just my budget and dividing by our current hours open, but I wondered if you guys had any other suggestions or ways that you determine how much it costs to keep your library open each hour. Thank you, Kat Boyer Interim Director Benton Harbor Public Library