[Excel] Macro on Grouping

Sub test()
Dim ra As Range, rdata As Range, filt As Range
Dim runique As Range, cunique As Range, j As Long
Set ra = Range(Range("A1"), Range("a1").End(xlDown))
Set rdata = Range("A1").CurrentRegion
Set runique = Range("A1").End(xlDown).Offset(5, 0)
ra.AdvancedFilter xlFilterCopy, , runique, True
Set runique = Range(runique.Offset(1, 0), runique.End(xlDown))
For Each cunique In runique
rdata.AutoFilter field:=1, Criteria1:=cunique.Value
Set filt = rdata.SpecialCells(xlCellTypeVisible)
j = WorksheetFunction.Subtotal(9, rdata.Columns("B:B"))
'MsgBox j
cunique.Offset(0, 1) = j
ActiveSheet.AutoFilterMode = False
Next cunique

End Sub

Sub undo()
Range(Range("A1").End(xlDown).Offset(1, 0), Cells(Rows.Count, "A")).EntireRow.Delete
End Sub