Correctly extract old user page count from DB

//get the number of pages printed by "old" users and add it to the total

$res = $sucsDB->Execute("select sum(pages) as pages from printer where username = 'old' group by username order by sum(pages) desc");

$old = $res->FetchRow();

$old = $old[0];

$old = $old['pages'];

$res->Close();

$total += $old;

//Output two lines at the bottem of the table, one for "old" users and the other for the total