If you have a lot of formulas to convert to values, it would probably be faster for the macro to copy the workbook, change columns B and C as I did, and then work from there. That would also eliminate the extra save.
If don't have a lot of data, this change to Paul's routine should suffice.
Private Sub CopySheet(ws As Worksheet)
Dim sFile As String, r As Range
sFile = ws.Parent.Path & Application.PathSeparator & Format(Date, "yyyy-mm") & " " & ws.Range("B2").Text
ws.Copy
With ActiveWorkbook
.SaveAs sFile, xlOpenXMLWorkbook
Set r = Intersect(.Worksheets(1).UsedRange, .Worksheets(1).Columns("B:C"))
r.Value = r.Value
.Save
.Close
End With
ThisWorkbook.Activate
End Sub