=IFERROR(IF([End Date (Projected/Actual)]@row = [Target End Date]@row , 0, IF([End Date (Projected/Actual)]@row > [Target End Date]@row , NETWORKDAYS([End Date (Projected/Actual)]@row , [Target End Date]@row ) + 1, IF([End Date (Projected/Actual)]@row < [Target End Date]@row , NETWORKDAYS([End Date (Projected/Actual)]@row , [Target End Date]@row ) - 1))))