Calculation of Capital Gain / Loss

Dear Members, Please tell me how can  i  Calculate my Capital Gain / Loss  in Shares, For example :-

            Purchase details : On   15 June 2008,  X  Purchases 100 Shares in  For    Rs. 12,000.00 ;  at the time of purchase X  pays :  Brokerage Rs. 6.15; Transaction Charges Rs. 2.50;  Stamp Duty Rs. 3.25;  Service Tax Rs. 9.50;  STT  Rs. 18.00. 

( Total Amount  X  pays for 100 Shares  12,000.00 + 6.15 + 2.50 + 3.25 + 9.50 + 18.00  = 12,039.40 )

            Sales  details : On   20 March 2009,  X  Sells 75 Shares  For  Rs. 10,875.00;  at the time of  Sales  X  pays :  Brokerage  Rs.5.25;  Transaction Charges  Rs.1.85;  Stamp  Duty  Rs. 2.25;  Service Tax  Rs.7.50;  STT  Rs. 16.00.

            ( Amount Realised after  paying Charges & Taxes: 10,875.00 - 5.25 – 1.85 – 2.25 – 7.50 – 16.00  = 10,842.15 )