S. 28(i) Business Income — Benefit or amenity arising from business — Remission or cessation of trading liability — Assessee introducing gold left behind by his father into his business and showing trade liability in his name and in name of other family as a whole or individual legal heir — AO accepting purchase of gold and approving trading results — Not a case of Assessee introducing unaccounted or unexplained money into capital or of a trade liability ceasing to exist. [S.41(1) ]