For the factory owner this amount certainly is negligible or almost nothing. But I’m sure for the worker it must be existential. Just for perspectives, do you think if someone gets caught stealing groceries for that amount - would the shop owner say “oh, never mind it’s only 800 Yuan”

I use brew ratio for finetuning: when I think my coffee is just a tiny bit too bitter, I would decrease output by maybe 1 - 2 grams. When I think, the effect is too little, I would grind a little coarser instead.

Unfortunately, I can give you only one upvote.