How to write and concatenate multi elements from an array to a single cell on a worksheet

Hi everyone,

Any help or input would be greatly appreciated. This is the line that I have trouble with: Cells(i, 1) = Missing

Result I am hoping for: 32, 35,49,76
Concatenated with "," between the elements in array

Sub MatchThem()
Dim There(1 To 99) As Integer
Dim Missing() As Integer

Application.ScreenUpdating = False
On Error Resume Next

For i = 4 To 27
    For j = 5 To 304
        There(Cells(i, j).Value) = 1
    Next
        If Application.WorksheetFunction.Sum(There) = 99 Then
            Cells(i, "A") = "AllThere"
        Else
            n = 0
            For k = 1 To 99
                If Not There(k) = 1 Then
                    n = n + 1
                ReDim Preserve Missing(1 To 1, 1 To n)
                    Missing(1, n) = k
                End If
            Next
            Cells(i, 1) = Missing
        End If
    Erase There
Next
On Error GoTo 0
Application.ScreenUpdating = True
End Sub