let
Source = Excel.CurrentWorkbook(){[Name="T_Data"]}[Content],
ModType = Table.TransformColumnTypes(Source, List.Transform(List.RemoveFirstN(Table.ColumnNames(Source),1), each {_, type duration})),
AjoutColonneTotal = Table.AddColumn(ModType, "Total", each List.Sum(List.RemoveFirstN(Record.ToList(_), 1)), type duration)
in
AjoutColonneTotal