Price inclusive of excise duty

Let us assume Rs.100 includes ED @ 12%, so breakup would be Rs.89 (basic price) + Rs.11 (ED) (i.e. 100/1.12 gives the basic price)

Similarly u can do it for any value.

Is this what u wanted to know?

Pidilite ind or other consumer goods manufacturers clear the goods under MRP basis and they get their calculations lower than MRP for duty calculation, so 1 or 2 percent does not effect on their MRP in short term, however in long term they may change the MRP