Simple projects include music, but do not include lighting and interviews. The per hour price is for all labour, including filming and editing. These projects are typically around 2 hours of filming and 4 or 5 hours of editing.
Complex projects require things like interviews and/or lighting, etc. The per hour price is for all labour, including filming and editing. These projects are usually a minimum of 5 hours of filming (including equipment set-up), and 12 hours of editing.
If I really believe in your organization and feel a personal connection to it, I may be willing to do your project at cost (I charge nothing, but the organization covers all costs, including travel expenses).