Private Sub Worksheet_Change(ByVal Target As Range)
If Intersect(Target, [J21,J60,J92,J124,J157,J189,J221,J253]) Is Nothing _
Or Target.CountLarge > 1 Or Not IsNumeric(CStr(Target(1).Value)) Then Exit Sub
Target.Select
If Left(Target(2).Formula, 1) <> "=" Or Not IsNumeric(Target(2)) Then Target(2) = "="
Target(2) = Target(2).Formula & IIf(Target >= 0, "+", "-") & Replace(Abs(Target), ",", ".")
Target = ""
End Sub