<?php
if (!defined('ABSPATH')) exit;

class AKHCTK_Shipping {

    public function __construct() {
        add_filter('akhctk_shipping_cost', [$this, 'calculate'], 10, 1);
    }

    public function calculate($total) {

        $total = intval($total);

        if ($total > 1000) {
            return 0;
        }

        return 50;
    }
}