$population = array('New York, NY' => 8008278,
'Los Angeles, CA' => 3694820,
'Chicago, IL' => 2896016);
$total_population = 0;
asort($population);
print "City Population
foreach ($population as $city => $people) {
$total_population += $people;
print "$city $people
}
print "Total $total_population
print "
\n";
?>