Assessee engaged in manufacturing and trading of submersible pumps, filed its return declaring certain taxable income.  The AO noted that there was slight increase in raw material consumption ratio and on the basis of increase in raw materials, he estimated increase in sales volume and added difference in estimate sales of income.  Tribunal held that, accounts of assessee were subject to statutory as well as tax audit, and same were not rejected by the AO.  Further nowhere he had expressed his inability to deduce true income from said accounts, it was also possible that some of items of raw material might be lying in closing stock or in semi-finished goods but such aspect had not been considered by AO while estimating unaccounted sales. Hence, addition made on estimate basis was deleted.  (AY.  2010-11)