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I understand the many inputs that are involved but if you take the accounting side of things it would take nothing to identify a % for each country involved. The difficulty you suggest sounds more like a marketing complaint. Company’s have all been only to quick lately to demonstrate how convenient it is to change their packaging.
I’m a lazy, not so bright contrarian who doesn’t know the details enough to have formed a sensible defense. What I do know is that I have a right to express my beliefs through my patronage and I’m currently being inhibited in that effort by the intentional obfuscation of the information I need.