Hi, This is not a formula, But you might get some Brownie points with this, then again maybe not.
One code is for "Forms" Tick Box and the Other for "ActiveX" (View, "ToolBar", "Control ToolBox").
Place a Tick Box on sheet, Right Click "Tab" Select "View Code" Paste Either code (depending) in VB Window.
Close VB Editor, run code by inserting/removing "discount"
Code:
Private Sub Worksheet_SelectionChange(ByVal Target As Range)
If Range("G11").Value = "discount" Then
ActiveSheet.Shapes("Check Box 4").ControlFormat.Value = False
Else
ActiveSheet.Shapes("Check Box 4").ControlFormat.Value = True
End If
Code:
If Range("G11").Value = "discount" Then
CheckBox1.Value = True
Else
CheckBox1.Value = False
End If
End Sub
Regards Mick