Sub Demo()
Application.ScreenUpdating = False
Dim Amt As Single
With ActiveDocument.Range
  With .Find
    .ClearFormatting
    .Replacement.ClearFormatting
    .Text = "EUR [0-9.]@m"
    .Replacement.Text = ""
    .Forward = True
    .Wrap = wdFindStop
    .Format = False
    .MatchWildcards = True
    .Execute
  End With
  Do While .Find.Found
    Amt = Amt + CSng(Split(Split(.Text, " ")(1), "m")(0))
    .Collapse wdCollapseEnd
    .Find.Execute
  Loop
End With
Application.ScreenUpdating = True
MsgBox "EUR " & Amt & "m"
End Sub