Being allowed to carry
as you choose is wonderful!
It would be very good to have this in writing somewhere, especially if your company has some kind of a written guide or handbook. If it's a very small firm and everything is just word of mouth, well, that will have to do.
It is also VERY important that she does not expect you to be armed security for the company in general -- and especially not for "goods."
This sounds good:
She said it was because she is kinda freaked out about all the shootings of late and is a little worried that in this eco we are due for a armed robbery, instead of just a burglary.
Being concerned for your life (and hers) is a valid reason to consider carrying, and being prepared to use violence if absolutely necessary.
This does NOT sound quite so good:
I also can say, if someone came in here, brandishing a weapon, demanding we give them all our money, jewelry, and a 5K plasma monitor or two and I had to put them down.
Yes, if they are brandishing a gun you should have plenty of legal justification for shooting, but if they're going to take some (insured, company-owned) stuff and leave, you probably don't have to. NOT shooting someone is better than shooting someone -- unless you (or maybe she) will DIE or suffer grievous injury if you don't.
Further, your scenario involves drawing "to a drawn gun." That is almost always a losing proposition. (Not to get too deep into the tactics of a completely hypothetical situation.)
This is a good thing, on the face of it, but you need to first sit down and consider exactly WHY and WHEN you would draw your gun, and second you need to talk that over with her. If she knows you are armed then she needs to understand and be on-board with your well-thought-out defensive mindset.
If armed criminals are walking out the door with your nifty monitor, the last thing in the world you need is her yelling, "SHOOT THEM! SHOOT THEM!"