Power Query
let
Source = Excel.Workbook(File.Contents("C:\Users\seven\Downloads\Sample WB.xlsx"), null, true),
#"Removed Top Rows" = Table.Skip(Source,1),
#"Removed Other Columns" = Table.SelectColumns(#"Removed Top Rows",{"Name", "Data"}),
#"Expanded Data" = Table.ExpandTableColumn(#"Removed Other Columns", "Data", {"Column1", "Column2", "Column3", "Column4"}, {"Column1", "Column2", "Column3", "Column4"}),
#"Promoted Headers" = Table.PromoteHeaders(#"Expanded Data", [PromoteAllScalars=true]),
#"Changed Type" = Table.TransformColumnTypes(#"Promoted Headers",{{"FName1", type text}, {"Customer Name", type text}, {"Column3", type any}, {"Set 1", type any}, {"Set 2", type any}}),
#"Filtered Rows" = Table.SelectRows(#"Changed Type", each ([Customer Name] <> null and [Customer Name] <> "Customer Name" and [Customer Name] <> "HOLIDAY" and [Customer Name] <> "SICK LEAVE")),
#"Grouped Rows" = Table.Group(#"Filtered Rows", {"Customer Name"}, {{"Set1", each List.Sum([Set 1]), type number}, {"Set2", each List.Sum([Set 2]), type number}})
in
#"Grouped Rows"
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