Urgent notes required

pratik (=) (133 Points)

14 April 2012  

hello frds i want the notes on following topics  urgently plz provide me -

1.   how to calculate central sales tax

2  .how to calculate central excise duity 

3  .Business income and capital gain

4.  exemption and deduction of totalr income 

plzzzzzzzzzz send me urgently .....