Maximum Retail Price Setup

Hi,

I have a requirement of one functionality i think available on Base system.

one item MRP is := 15650.00

Excise is Calculated on only 65% of MRP Value :15650*65% =10173.00

10173.00*12%=1221

1221*2% = 24

1221*1%=12

Excise Value is:= 1257.00

total value is 10173+1257:= 11430

In MRP value given the discount of 44% to the customer 15650-(15650*44%)=8764.00

VAT calculated on 8764*13.25 % =1151.00

In 11430-8764 = 2666.00

because customer is not give the excise but company submit the excise to government.

Total is 8764+1151 := 9915/-

What is exactly requirement ?