public override void OnInspectorGUI()
    {
        EditorGUILayout.HelpBox("This script contains all persistant shop information", MessageType.Info);

        ShopController script = (ShopController)target;

        if (GUILayout.Button("AssignDefaultValues"))
        {
            if (script != null)
            {
                script.AssignDefaults();
            }
        }
        base.OnInspectorGUI();
    }