$xs_zb=array(6.7,3,5.5,13.3,7.1,22.5,7,9.3,5.3,19.2,1.1); 

foreach($xs_zb   as   $tqq) 
{ 
    $tt+=$tqq; 
    echo   $tqq."====> ".$tt." <br> "; 
} 
$tt = round($tt,2); 

if($tt==100.00){ 
echo   ("output");
}