I have a box of microwavable popcorn I bought recently that's the best example I've ever seen of this. It reads: > Serving Size: 2 Tbsp unpopped (makes about 4

I have a box of microwavable popcorn I bought recently that's the best example I've ever seen of this. It reads: > Serving Size: 2 Tbsp unpopped (makes about 4.5 cups popped) > Servings Per Bag: about 2.5 > Calories (2 Tbsp unpopped): 170 > Calories (1 Cup popped): 35 How many calories per bag? The worst thing is, it fooled me. I wouldn't've bought it if I'd realized the answer was about 400.