So I was doing some basic calculations on my Mac's Calculator and it can't add! (well technically I can't add either, since I'm using it for basic addition, but lets stay focused here). I'm attaching an unadulterated snapshot of the addition on paper tape. Here is what it added: 1067+96+802+60+30+60 = 2655 Now, I'm not a math wizard, but shouldn't that equal 2115?? is this a bug or did I hit something wrong?