let
    from = Excel.CurrentWorkbook(){[Name="Таблица1"]}[Content],
    group = Table.Group(from, {"Имя"}, {"tmp", each 
                                                    [a=Table.LastN(_,10), 
                                                    Колво = List.Count(a[Имя]), 
                                                    Сумма = List.Sum(a[Колво])] 
                                        }),
    to = Table.ExpandRecordColumn(group, "tmp", {"Колво", "Сумма"})
in
    to

let
    from = Excel.CurrentWorkbook(){[Name="Таблица1"]}[Content],
    group = Table.Group(from,"Имя", {"tmp", each 
                                               [a=Table.LastN(_,10),
                                                Имя = a[Имя]{0}, 
                                                Колво = List.Count(a[Колво]), 
                                                Сумма = List.Sum(a[Колво])]
                                            [[Имя],[Колво],[Сумма]]
                                    })[tmp],
    to = Table.FromRecords(group)
in
    to