let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("ddBBCsMwDETRqxSvQ5HGthz1KiH3v0ZNR9CFFPDuMQj/62pi7/0gkJfqZ0o7mtpq97HJ/4SgpT9SeSbNhJOEYsVb2jN5J41MI1YzkxrJMpmTVqY5SefzqqgRhKJGF1JRw4OKGggqagzmRVGjg1TU8P2v+ws=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Date = _t, Sales = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Date", type datetime}, {"Sales", Int64.Type}}),
    #"Extracted Date" = Table.TransformColumns(#"Changed Type",{{"Date", DateTime.Date, type date}}),
    #"Added WN" = Table.AddColumn(#"Extracted Date", "WN", each Date.Year([Date]) * 100 + Date.WeekOfYear([Date]), Int64.Type),
    ForGroupping = Table.SelectColumns(#"Added WN", {"WN"}),
    #"Grouped Rows" = Table.Group(ForGroupping, {"WN"}, {}),
    #"Added Index" = Table.AddIndexColumn(#"Grouped Rows", "Index", 1, 1),
    #"Joined ToGetIndices" = Table.NestedJoin(#"Added WN", "WN", #"Added Index", "WN", "AllRows", JoinKind.Inner),
    #"Expanded AllRows" = Table.ExpandTableColumn(#"Joined ToGetIndices", "AllRows", {"Index"}, {"Index"}),
    #"Added Custom" = Table.AddColumn(#"Expanded AllRows", "Period Name", each Text.From([Index]) & " Период", type text),
    #"Removed Other Columns" = Table.SelectColumns(#"Added Custom",{"Date", "Sales", "Index", "Period Name"})
in
    #"Removed Other Columns"