S. 145 : Method of accounting Search-Statement on oath- Method of accounting- Estimation of income- Manufacturing of Jewellery and in trading of Gemsstones – Bogus purchase bills -Average gross profit – Tribunal deleted the addition- Court held that ,since average gross profit (GP) rate in assessee’s industry was 12 per cent, wherever profit of assessee was more than 12 per cent, same would not be refunded to assessee but where it was less than 12 per cent, income would be assessed on basis of 12 per cent. [S. 153A]