A couple assumptions:
"We didn't all break 100." includes the possibility that no one did.
"Bill placed between Ed and Jim" means directly between.
Well, I seem to have done some weird math when adding equilateral. New result including equilateral:
I think rocdocmac and I agree on the figure including equilateral now but we seem to have diverged on the other figure...
You figured it "ou"? Lol. Just caught on to Captain Ed's hint. Was wondering why that wording was nagging at me... If you didn't get it, I was going to recommend listening to the song Message in a Bottle. That ending aught to do it.