Look, friend, just the fact that any time the NRST rate is quoted, it specifies "inclusive", not just 23%, is a rather large hint, don't you think?
If the real price that the buyer ends up paying is really $123 on a raw price of $100, you would just have said, "It's $123." That's all you have to say. The end, no further. Yet there is this political type two step around the question.
If you go into a store to purchase an item and it has a price tag on it of $100, when you go to the register to check out it will ring up for $100. Not $123. Not $130. But $100.