Group data and create columns for weekdays and Time values

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("zZXJCsIwEIZfZeg5atKKbb2JCxZcilY8VA8BFyJpKq2+v3VARIxHyVwmmZDl48vhz3NPiCCMPeYNy+qmLkrrsob1VSrTrI2mM0gHs/lyMV4z2FU7M+zAqJJnWSgjawYiYpCWug2JObQhlboozbGGJMHNr6PY4Ds483kARXO7uWv9HoS3Zy5p5sum8LDPeYtHTSWDFD+RRJcQkughEhFL2YacJUSiZWk7JmcJkWhZyqbkLCESLUuTFTlLiPTDUvTsMlmpk/w3TRD7oSXbfJcolhRxz/P5VU55LPnhnoeQH0tyuOch5MeSGe55CPmxpIV7ni8/+wc=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Postal = _t, #"City Country" = _t, #"Collect Point" = _t, Date = _t, Time = _t, Index = _t]),
    FilteredRows = Table.SelectRows(Source, each ([Date] <> "null" and [Date] <> null)),
    GroupedRows = Table.Group(FilteredRows, {"Collect Point", "Date"}, {{"All", each Table.AddIndexColumn(_, "ID", 1, 1, type text), type table}}),
    CombinedAll = Table.Combine(GroupedRows[All]),
    AddedPrefix = Table.TransformColumns(CombinedAll, {{"ID", each "Time" & Text.From(_), type text}})
in
    AddedPrefix