1977). To support his proposition that a district court abuses its discretion in awarding spousal maintenance that creates a monthly deficit for the payor, husband relies on an unpublished opinion, McCallum v. McCallum, A07-2221, 2008 WL 5136909, at *3 (Minn. App. Dec. 9, 2008). As an unpublished opinion, McCallum has no precedential value.