Please Answer - Shares Profit / Loss -- Short Term and Intraday Calculation

• old balance = 100x10 = 1000
• sell = 50x8=400 less 50x10= 500 STCL 100 
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• sell = 30x12= 360 less 30x10 = 300 = 60 STCG
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• buy = 40x11= 440
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• STCL = 100-60 = 40
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• stock in hand 
• old balance = 100 -(50+30) = 20 x10 =200
• New buy = 40x11=440
• total stock in hand = 60 shares .value 640
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• as the quantity of all trades differ in buy / sell , so FIFO system is maintained, i.e sale from old balance and buy is added in stock 

Sharma Sir... Thank You very much for your reply.

As u told

"as the quantity of all trades differ in buy / sell , so FIFO system is maintained, i.e sale from old balance and buy is added in stock "

My query is if quentities are same as following, what should be done? If we change the method (other than FIFO) , than is it permitable according Income Tax Laws to change methods?

Old Shares of xyz ltd. --- 100 shares @ Rs. 10

Transactions On 08/01/2011 of xyz ltd. shares:

          Qty    Rate

Sell   50     @ 8             = 400

Buy    30    @ 11             = 330

Sell   30     @ 12            = 360

Thank You

situation is same still , unless u bought the stock specific for intraday, then only   that trade will go squared up without touch of DP 

then the 2nd and 3rd transaction will go as ..............360-330=30 intraday / speculaton profit 

better to deal the intraday in account which is not related to stock in holding of same scrip