Hi all, hoping someone can help me figure this out. I've been searching for a local source for Tri Tip and finally found one, or so I thought....when I went to pick it up I was presented with this gigantic 7 pound roast. This is the top side:

And the bottom.

I was expecting a 2-4 pound roast in the shape of a triangle. This weighs 7 pounds and looks like something totally foreign. Does any one have any idea of what this is?? Did I get duped or is the little triangle on the inside of this somehow? (i.e. could this be he whole bottom sirloin?)

Sue