If you get the macro to work and want to restrict the cells it looks at,
create a range name that includes the cells with the numbers in the comments,
call it say MyRange. Then include the following lines
set rng = range("myrange")
rng.select
then the macro will only look at the cells in MyRange. I've done it for you
below
Sub Test()
Dim i As Integer
Dim myText As String, List, myTotal As Double
Dim cell As Range, rng as range
set rng = range("myrange")
rng.select
Set cmt = ActiveSheet.Comments
Selection.SpecialCells(xlCellTypeComments).Select
For Each cell In Selection
cell.Select
myTotal = 0
myText = cell.Comment.Text
myText = WorksheetFunction.Substitute(myText, Chr(10), " ")
myText = WorksheetFunction.Substitute(myText, "=", " ")
myText = Trim(myText)
List = Split(myText, " ")
For i = LBound(List) To UBound(List)
If IsNumeric(List(i)) Then
myTotal = myTotal + List(i)
End If
Next i
cell = myTotal
Next cell
Cells(1, 1).Select
End Sub
Regards
Peter