Spreadsheet That Uses Control Functions To Run Vb Code

i have a spreadsheet that uses control functions to run vb code. i am trying to make things as user friendly as possible for all of the employees. i am currently working on a control to clean out any rows that the first cell has a value of "N/A" or is left blank. i have the code for the blank cells, but cannot figure out how to add the "N/A" cells.

here is the current

Private Sub CommandButton2_Click()
Dim rng As Range
On Error Resume Next
Set rng = Columns(1).SpecialCells(xlBlanks)
On Error GoTo 0
If Not rng Is Nothing Then
rng.EntireRow.Delete
End If
End Sub