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Goal

Echo a one-file kiosk summary.

<?php
$rows = [
  ["city" => "Nairobi", "units" => 12],
  ["city" => "Kisumu", "units" => 5],
];
$total = array_sum(array_column($rows, "units"));
echo "cities ", count($rows), PHP_EOL;
echo "units ", $total, PHP_EOL;

<?php
echo "Download As → .php from the toolbar", PHP_EOL;