JobcardSystem/app/Domain/Jobcard/TimeAggregator.php

<?php
declare(strict_types=1);

namespace App\Domain\Jobcard;

final class TimeAggregator
{
    public function total(array $entries): float
    {
        $total = 0.0;
        foreach ($entries as $entry) {
            if (is_array($entry) && isset($entry['hours']) && is_numeric($entry['hours'])) {
                $total += max(0.0, (float) $entry['hours']);
            } elseif (is_numeric($entry)) {
                $total += max(0.0, (float) $entry);
            }
        }
        return round($total, 2);
    }

    public function slaTotal(array $entries): float
    {
        return $this->total(array_values(array_filter(
            $entries,
            static fn ($entry): bool => is_array($entry) && in_array($entry['counts_toward_sla'] ?? true, [true, 1, '1'], true)
        )));
    }
}