Yeah totally agree on the idea but a subjective way to calculate because as i wrote in first post, is exactly the same for every business, you have fixed charges and variable ones (not sure of the english words) and calculating to have an idea to what you need to reduce to pay less is one thing, but considering is unfair because - due to other fees only ! - the subjective percentage of one variable fee (and not the others) is higher is not good math even if the result is right.
I would say, don’t pay your mortgages. Don’t pay your employees. Don’t pay nothing, even food in market. It will be back to 5 % only. 