WC_Tax::calc_inclusive_tax PHP Method

    public static function calc_inclusive_tax($price, $rates)
    {
        $taxes = array();
        $regular_tax_rates = $compound_tax_rates = 0;
        foreach ($rates as $key => $rate) {
            if ('yes' === $rate['compound']) {
                $compound_tax_rates = $compound_tax_rates + $rate['rate'];
            } else {
                $regular_tax_rates = $regular_tax_rates + $rate['rate'];
            }
        }
        $regular_tax_rate = 1 + $regular_tax_rates / 100;
        $compound_tax_rate = 1 + $compound_tax_rates / 100;
        $non_compound_price = $price / $compound_tax_rate;
        foreach ($rates as $key => $rate) {
            if (!isset($taxes[$key])) {
                $taxes[$key] = 0;
            }
            $the_rate = $rate['rate'] / 100;
            if ('yes' === $rate['compound']) {
                $the_price = $price;
                $the_rate = $the_rate / $compound_tax_rate;
            } else {
                $the_price = $non_compound_price;
                $the_rate = $the_rate / $regular_tax_rate;
            }
            $net_price = $price - $the_rate * $the_price;
            $tax_amount = $price - $net_price;
            $taxes[$key] += apply_filters('woocommerce_price_inc_tax_amount', $tax_amount, $key, $rate, $price);
        }
        return $taxes;
    }

 /**
  * Price Filter post filter.
  *
  * @param array $filtered_posts
  * @return array
  */
 public function price_filter($filtered_posts = array())
 {
     global $wpdb;
     if (isset($_GET['max_price']) || isset($_GET['min_price'])) {
         $matched_products = array();
         $min = isset($_GET['min_price']) ? floatval($_GET['min_price']) : 0;
         $max = isset($_GET['max_price']) ? floatval($_GET['max_price']) : 9999999999;
         // If displaying prices in the shop including taxes, but prices don't include taxes..
         if (wc_tax_enabled() && 'incl' === get_option('woocommerce_tax_display_shop') && !wc_prices_include_tax()) {
             $tax_classes = array_merge(array(''), WC_Tax::get_tax_classes());
             foreach ($tax_classes as $tax_class) {
                 $tax_rates = WC_Tax::get_rates($tax_class);
                 $min_class = $min - WC_Tax::get_tax_total(WC_Tax::calc_inclusive_tax($min, $tax_rates));
                 $max_class = $max - WC_Tax::get_tax_total(WC_Tax::calc_inclusive_tax($max, $tax_rates));
                 $matched_products_query = apply_filters('woocommerce_price_filter_results', $wpdb->get_results($wpdb->prepare("\n\t\t\t\t\t\tSELECT DISTINCT ID, post_parent, post_type FROM {$wpdb->posts}\n\t\t\t\t\t\tINNER JOIN {$wpdb->postmeta} pm1 ON ID = pm1.post_id\n\t\t\t\t\t\tINNER JOIN {$wpdb->postmeta} pm2 ON ID = pm2.post_id\n\t\t\t\t\t\tWHERE post_type IN ( 'product', 'product_variation' )\n\t\t\t\t\t\tAND post_status = 'publish'\n\t\t\t\t\t\tAND pm1.meta_key IN ('" . implode("','", array_map('esc_sql', apply_filters('woocommerce_price_filter_meta_keys', array('_price')))) . "')\n\t\t\t\t\t\tAND pm1.meta_value BETWEEN %f AND %f\n\t\t\t\t\t\tAND pm2.meta_key = '_tax_class'\n\t\t\t\t\t\tAND pm2.meta_value = %s\n\t\t\t\t\t", $min_class, $max_class, sanitize_title($tax_class)), OBJECT_K), $min_class, $max_class);
                 if ($matched_products_query) {
                     foreach ($matched_products_query as $product) {
                         if ($product->post_type == 'product') {
                             $matched_products[] = $product->ID;
                         }
                         if ($product->post_parent > 0) {
                             $matched_products[] = $product->post_parent;
                         }
                     }
                 }
             }
         } else {
             $matched_products_query = apply_filters('woocommerce_price_filter_results', $wpdb->get_results($wpdb->prepare("\n\t\t\t\t\tSELECT DISTINCT ID, post_parent, post_type FROM {$wpdb->posts}\n\t\t\t\t\tINNER JOIN {$wpdb->postmeta} pm1 ON ID = pm1.post_id\n\t\t\t\t\tWHERE post_type IN ( 'product', 'product_variation' )\n\t\t\t\t\tAND post_status = 'publish'\n\t\t\t\t\tAND pm1.meta_key IN ('" . implode("','", array_map('esc_sql', apply_filters('woocommerce_price_filter_meta_keys', array('_price')))) . "')\n\t\t\t\t\tAND pm1.meta_value BETWEEN %d AND %d\n\t\t\t\t", $min, $max), OBJECT_K), $min, $max);
             if ($matched_products_query) {
                 foreach ($matched_products_query as $product) {
                     if ($product->post_type == 'product') {
                         $matched_products[] = $product->ID;
                     }
                     if ($product->post_parent > 0) {
                         $matched_products[] = $product->post_parent;
                     }
                 }
             }
         }
         $matched_products = array_unique($matched_products);
         // Filter the id's
         if (0 === sizeof($filtered_posts)) {
             $filtered_posts = $matched_products;
         } else {
             $filtered_posts = array_intersect($filtered_posts, $matched_products);
         }
         $filtered_posts[] = 0;
     }
     return (array) $filtered_posts;
 }