Caliculation Type for Assesable Value

Dear All,

How to calculate the excise duty and special additional duty in the following scenario.

Basic Price of Material is 2500

Excise Duty is 8% on Assesable value (1500*8%) 120 Assesable Value is 1500 in this case

Cess on Excise Duty 2% 2.4

Secondary Higher E. Cess on Excise Duty 1% 1.2

Special Additional Duty is 4% on ( Assesable -

value + Excise Duty + Cess + SHE.Cess

1500 + 120 + 2.4 + 1.2 *4% 64.94

Please tell me how to caliculate 8% on 1500

and Special Additional Duty as per above mentioned calculation

Please tell me how to resolve this issue

Thanks n regards

Siri