<?php

namespace App\Utilities;

class Margin
{
    public static function calculate($arr, $stellen = 3)
    {
        if (! is_array($arr)) {
            return false;
        }
        $r = 0;
        foreach ($arr as $key => $value) {
            $r += 100 / $value;
        }

        return round($r, $stellen);
    }
}