[Principled]

If you have ten components of cost and the most that any of them are reduced is 10%, then you are going to have less than a 10% reduction in your total cost.

This does not model the nrst. It's not what we're talking about. In the nrst, each stage affects the future stage and so on.

[RobFromGa]

I am talking about the way that a business operates, it does not change due to the nrst, because the nrst does not tax businesses in any way, until the final sale is made.

Perhaps you are confused with a VAT, or ? Actually, I have no idea what you are talking about.