For myself, I'd guesstimate the weight of each item, Daily Plate it as best you can, and move on.
Occasionally, I get too concerned about the numbers. Numbers of calories, number on the scale, number for protein vs. carbs, number of reps, number of minutes I need to work out to actually see progress. I can really obsess, if I don't watch it.
So, basically, I've resolved (as best I can), to count everything as honestly as I can and move on. No matter what the 'true' numbers are, as long as I'm doing my best to move in the right direction, I'm doing all I can.
Not sure if this is helpful. Maybe someone will come along soon with a helpful suggestion.