Trusting single-serving packaged food nutrition information

it probably depends now much prepackaged stuff you eat, too. I mean, going over my last five days, the prepackaged stuff amounts to:

one and a half protein bars
2 tillamoo cheeses
an ice cream bar
a package of ramen noodles

So it's unlikely, eating so few packaged items, that I can really screw myself up too bad, so it's not worth it to me.