S. 254(2) : Appellate Tribunal-Rectification of mistake apparent from the record –Bogus purchases–Estimation of profit at 1.5 % of on sales and purchases- Re hearing of appeal is not permissible in law-Writ against the rectification is held to be not bonafide – Cost of Rs 10000 is imposed on each of the petitioners. [S.69C, 254(1), Art. 226]