/**
 * Returns the total income for an event.
 *
 * @since	1.3
 * @param	int		$event_id	The event ID.
 * @return	int|str				The income for the event.
 */
function mdjm_get_event_income($event_id)
{
    if (empty($event_id)) {
        return false;
    }
    $event = new MDJM_Event($event_id);
    return $event->get_total_income();
}