Insert tablerow and paste formula in it

I have a question. The dutch forum coudn't help me out, so i'm posting this here.

I have a protected Excel-sheet with a table in it. Users can add data to the table and insert and deletes rows.

I have already a working VBA to insert (and delete) a row. But i won't copy the formula from the cell above (this case J24).

screenshot: screenshot

The VBA is:

Private Sub CommandButton1_Click() 
    ActiveSheet.Unprotect Password:="password"
    ActiveSheet.ListObjects("Tabel2").ListRows.Add AlwaysInsert:=True
    ActiveSheet.Protect Password:="password" 
End Sub

Private Sub CommandButton2_Click() 
    ActiveSheet.Unprotect Password:="password"
    ActiveSheet.ListObjects("Tabel2").ListRows(ActiveSheet.ListObjects("Tabel2").ListRows.Count).Delete
    ActiveSheet.Protect Password:="password" 
End Sub

What do I have to add to make it work?

Could some-one help me?

Many thanks!!!!