AAC Top guilds by storage

[Jakubens]

I have this code for top guilds in latest news

$main_content .= '<div class="NewsHeadline">
    <div class="NewsHeadlineBackground" style="background-image:url(' . $layout_name . '/images/news/newsheadline_background.gif)">
        <table border="0">
            <tr>
                <td style="text-align: center; font-weight: bold;">
                    <font color="white">Most powerfull guilds</font>
                </td>
            </tr>
        </table>
    </div>
</div>
<table border="0" cellspacing="3" cellpadding="4" width="100%">
    <tr>';
foreach($SQL->query('SELECT `g`.`id` AS `id`, `g`.`name` AS `name`,
    `g`.`logo_gfx_name` AS `logo`, COUNT(`g`.`name`) as `frags`
FROM `killers` k
    LEFT JOIN `player_killers` pk ON `k`.`id` = `pk`.`kill_id`
    LEFT JOIN `players` p ON `pk`.`player_id` = `p`.`id`
    LEFT JOIN `guild_ranks` gr ON `p`.`rank_id` = `gr`.`id`
    LEFT JOIN `guilds` g ON `gr`.`guild_id` = `g`.`id`
WHERE `k`.`unjustified` = 1 AND `k`.`final_hit` = 1
    GROUP BY `name`
    ORDER BY `frags` DESC, `name` ASC
    LIMIT 0, 4;') as $guild)
    $main_content .= '        <td style="width: 25%; text-align: center;">
            <a href="?subtopic=guilds&action=show&guild=' . $guild['id'] . '"><img src="guilds/' . ((!empty($guild['logo']) && file_exists('guilds/' . $guild['logo'])) ? $guild['logo'] : 'default_logo.gif') . '" width="64" height="64" border="0"/><br />' . $guild['name'] . '</a><br />' . $guild['frags'] . ' kills
        </td>';
$main_content .= '    </tr>
</table>';

Could someone help me with changing it to show top guilds with storage XXXX.
Sum every guild member storage XXXX, show it and sort.