Beam Loading Question
I don't know how you did your calculation, but my rough estimate is now shown to be conservative because of additional information you provided. The fact that the beam is continuous and that there are two beams and not just one.
Moving a beam that is under a wall is a very bad idea. This is exactly what I was talking about in my previous posts when I mentioned load path. Right now, all of those wall loads (which carry attic and roof loads as well) go directly into that beam. If the beam is moved, the floor joists now have to carry that considerable load over to the beam. If what you have is original construction, I'm pretty sure they were not designed to do this.
Yes, my primary work is in structural. Again, I suggest you get an experienced guy to take a look. The devil's in the details...