Cost of acquisition rules set stock-in-trade basis for assets received by amalgamation, gift, will, trust, or partition. Special computation rule fixes the cost of acquisition for assets becoming property by amalgamation, gift, will, irrevocable trust, or HUF partition when sold as stock-in-trade as the transferor's original cost plus any cost of improvement and any expenditure incurred by the transferor or amalgamating company wholly and exclusively in connection with the transfer; the rule applies for computing income under Profits and Gains of Business or Profession and excludes assets covered by the specified exception.