Raw Material sale with same Excise Duties but different price

Hi All,

1. I bought the Raw material from Vendorfor at Rs.1000/- and the Excise Duties paid on that is Rs.144.20/-

2. While selling the same material, I am charging for my customer Rs.1200/- but Excise Duties should be 144.20/- NOT Rs.173.04/-(If i calculate on Rs.1200/-).

I want to charge the same Excise Duties which I ahve paid to my customer.

So how can I map this?

Plz suggest me.

Thanks & Regards,

Ramu