I realize you've already eaten them so this won't work, but what I do is weigh everything. Then I just take the given values and divide by the quantity and mulitply by what I had.

For example, say you ate an ounce of blueberries.
100 grams (approx. 3.5 oz) of blueberries =
56 calories, 11.43 net carbs (carbs - fiber), .67 protein, .38 fat
For one ounce, you would then just divide the above values by 3.5.
So, one ounce = 16 calories, 3.3 net carbs, .19 protein, .11 fat.

You could also measure them and do the same thing, as there are values given for cups also. I just find it far more accurate (and easy) to weigh everything.

HTH

BTW: You could weigh/measure 10 blueberries and get a ballpark figure for what you've consumed.