6 months ago:
> Me: Let's use a collaborative editing solution for this so we're not emailing stuff back and forth with impossible-to-track changes.
Boss: Nah, my Dropbox is full and I prefer emailing things anyway.
Me: Okay then…
Yesterday:
> Boss: So the spreadsheet I sent you 6 weeks ago and the one you sent me a few days ago don't match up.
Me: Uh huh.
1 hour later, I still don't get how she arrived at the sum total she did, because, running a sum on the same column in either sheet, I can't reproduce her result. And she didn't explain her method. So I'm confused and it's probably going to be a huge waste of time for both of us.
Knew this would happen.