$i = 1;
$var_startVal = 500;
$var_endVal = 500;
$var_amount = 50;

while( $i <= 65 ) {
  $var_startVal += 500;
  $var_endVal += 500;
  $var_amount += 50;

  $startVal = 35501, $var_startVal;
  $endVal = 36000, $var_endVal;
  $amount = 3575, $var_amount;
  echo "array(
";
    echo "'low'     => '".$startVal."',
";
    echo "'high'    => '".$endVal."',
";
    echo "'amount'  => '".$amount."',
";
    echo '\'city\'    => $city
';
  echo "),
";
  $i++;
}