Thank you all for the info! Pete_UK - those are the type reports I want to get to, once I expand my knowledge of pivot tables/charts/etc. As for now, Olly - that's my ideal starting point, what you provided. I don't know how to go about doing that, but I'm working on it.
Let me "sanitize" the data to remove and personally identifiable information from it and I'll upload a sample of the full data. It's very similar (but not quite) to what Pete_UK has in his .pdf (but not exactly).
Thank you very much all! I'm extremely grateful!
BPB