Show number of points on author page?

You can probably get all the post ID that the author has make and base on the post ids, get the post meta “ratings_score” and sum it all up.

I found this little snippet kicking around but it doesn’t seem to output anything when I put it on the author page, what am I doing wrong?

function ac_author_score() {

	$userID = get_the_author_meta( 'ID' );
	$query = array (
		'author' => $userID,
		'posts_per_page' => -1
	);
	$queryObject = new WP_Query($query);

	while( $queryObject->have_posts() ) : $queryObject->the_post();

	global $post;
	$postID = $post->ID;

	$score = $score + intval( get_post_meta( 'ratings_score', $postID, true ) );

	endwhile; 

	wp_reset_query();

	if ( $score > 0 )
		$score = '+' . $score;

	return $score;

}
?>

Because the function is returning the $score instead of printing it out?