Sub Edit()
Dim intRow As Integer, intRowL As Integer
Application.ScreenUpdating = False
intRowL = Cells(Rows.Count, 3).End(xlUp).Row
For intRow = 2 To intRowL
Cells(intRow, 3) = Cells(intRow, 3) & " - " & Cells(intRow, 4)
Next intRow
Range(Cells(2, 4), Cells(intRowL, 4)).Value = "489-610"
Columns.AutoFit
Application.ScreenUpdating = True
End Sub