I couldnt find it on the esource site which was strange so to be safe i would go with the 5pp for 2 slices. I would imagine its 5pp as each slice before would have been just over 2 points so its been rounded... when it comes to 5 points, its taken the extra and rounded up.
There is a rule that its 40 cals per point i think it is so if your really unsure, follow that and you cant go too wrong
