(table,Mt0,Mt1) => let
    #"Add Yt.1" = Table.AddColumn(table, "placeholder",
        each if Table.Column(table,Mt0) <= 0 or - Table.Column(table,Mt1) < Table.Column(table,Mt0)
            then Table.FromRecords({[Mt0 = Table.Column(table,Mt0), Mt1 = Table.Column(table,Mt1)]})
        else Table.FromRecords({[Mt0 = 0,Mt1 = Table.Column(table,Mt1) + Table.Column(table,Mt0)]}))/*,
    #"Expand Yt.1" = Table.ExpandTableColumn(Table.RemoveColumns(#"Add Yt.1",{"Mt0", "Mt1"}), "placeholder", {"Mt0","Mt1"})*/
in #"Add Yt.1"