Charges calculation on (Net + Excise) Value

Dear Friends,

I need to setup a Purchase charge code which should calculate the value based on NET + EXCISE Duty.

For Ex. Qty 100 Rate 100 then  100 x 100 = 10000

Excise 12.36 = 1236

The total value is 11236.

One charge called Misc Charges is 1% of Total Value.

In Ax 2012 R2, the charges are calculating on Net ( 10000) value.

Please suggest

Rahul