S. 144 : Best judgement assessment-Assessing Officer rejected the books of account and estimated the net profit rate of 12%-CIT(A) estimated at 6.5%.-Order of CIT(A) is affirmed-Un explained expenditure-When the income is estimated separate addition as unexplained expenditure cannot be made-Order of CIT(A) is affirmed. [S. 69C, 145(3)]