Generate incremental number in groups

... editor eating my code again ...

let
    Source = Excel.CurrentWorkbook(){[Name="Tabelle1"]}[Content],
    #"Grouped Rows" = Table.Group(Source, {"pricebracket"}, {{"Min", each List.Min([price]), type number}, {"AllRows", each _, type table}}),
    #"Sorted Rows" = Table.Sort(#"Grouped Rows",{{"Min", Order.Ascending}}),
    #"Added Index" = Table.AddIndexColumn(#"Sorted Rows", "Index", 1, 1),
    #"Removed Columns" = Table.RemoveColumns(#"Added Index",{"pricebracket", "Min"}),
    #"Expanded AllRows" = Table.ExpandTableColumn(#"Removed Columns", "AllRows", {"price", "pricebracket"}, {"price", "pricebracket"})
in
    #"Expanded AllRows"

Only mildy amusing - all previews look fine and once posted randomly cut.

Hopefully this link the the xlsx containing the M-code will survive: File