I've noticed this more than once.......

ie, check out the nutritional values for cooked extra lean ground beef:

Calories 219
Protein 31
Carbohydrates 0
Fat 8.7
Cholesterol 78mg

Now by additon: (31*4)+(8.7*9) = 202.3

How did they overshoot this by nearly 20 calories?

And I've noticed this more than once on different foods. Are they incorporating a value that I am omitting??