Transform and Sort Data from Buckets and Data in same Column

Simple enough,

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WcipNzk4tUXBU0lFSitWJVnJ0cgYyzQ2QOZa4ZCxMwRyoGU6oZpgYIXGMkLWZoWhzRtVmaILEsUQ2wxiZY2qMrMwYzYBYAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Expense = _t, #"Expense Amount" = _t]),

    Grouped = let cols=Table.ColumnNames(Source) in Table.Group(Source, "Expense Amount", {"grp", each Table.CombineColumns(_, cols, (l)=>if l{1}="" then l{0} else l{1}, "Bucket")[Bucket]}, 0, (x,y) => Byte.From(y="")),
    Result = Table.PromoteHeaders(Table.FromColumns(Grouped[grp]))
in
    Result

1. Transform the Expense column by leaving only the bucket names
   1. These correspond to the null rows in the second column which I have named Expense Amt
2. Fill down the Expense column with the corresponding bucket names
3. Remove the null rows form the second column
4. Pivot with no aggregation
   1. You can't use the Pivot function in the UI because, with no aggregation, it won't work when there are multiple rows of the same type
   2. So I use a custom function (with attribution) found on the net

Custom Pivot function

Rename fnPivotNoAggregation

//credit: Cam Wallace  https://www.dingbatdata.com/2018/03/08/non-aggregate-pivot-with-multiple-rows-in-powerquery/

//Rename:  fnPivotNoAggregation

(Source as table,
    ColToPivot as text,
    ColForValues as text)=> 

let
     PivotColNames = List.Buffer(List.Distinct(Table.Column(Source,ColToPivot))),
     #"Pivoted Column" = Table.Pivot(Source, PivotColNames, ColToPivot, ColForValues, each _),
 
    TableFromRecordOfLists = (rec as record, fieldnames as list) =>
    
    let
        PartialRecord = Record.SelectFields(rec,fieldnames),
        RecordToList = Record.ToList(PartialRecord),
        Table = Table.FromColumns(RecordToList,fieldnames)
    in
        Table,
 
    #"Added Custom" = Table.AddColumn(#"Pivoted Column", "Values", each TableFromRecordOfLists(_,PivotColNames)),
    #"Removed Other Columns" = Table.RemoveColumns(#"Added Custom",PivotColNames),
    #"Expanded Values" = Table.ExpandTableColumn(#"Removed Other Columns", "Values", PivotColNames)
in
    #"Expanded Values"

Main Query

let

//Change table name in next line to reflect your actual data source
    Source = Excel.CurrentWorkbook(){[Name="Table6"]}[Content],
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Expense", type text}, {"Expense Amt", Int64.Type}}),

//Remove the non-Bucket Name values from first column
//Then fill down the bucket name
    bucketList = Table.FillDown(
                    Table.FromRecords(
                        Table.TransformRows(#"Changed Type",(r)=>
                            Record.TransformFields(r,{"Expense", each if r[Expense Amt] <> null then null else _}))),
                                {"Expense"}),
//Remove null rows
    #"Filtered Rows" = Table.SelectRows(bucketList, each ([Expense Amt] <> null)),

//Pivot on Expense with no aggregation
    pivot = fnPivotNoAggregation(#"Filtered Rows","Expense","Expense Amt"),

//set data types
    typeIt = Table.TransformColumnTypes(pivot, List.Transform(Table.ColumnNames(pivot),each {_, Int64.Type}))
in
    typeIt