FOX - Currency Switcher Professional for WooCommerce

Plugin link: https://ignitewoo.com/woocommerce-extensions-plugins-themes/woocommerce-ups-drop-shipping/

• in file  \wp-content\plugins\woocommerce-ups-shipping\ups_class.php add next code:

  if (class_exists('WOOCS')) {
      global $WOOCS;
      $currency = $WOOCS->get_currency_by_country($this->origincountry);
      $currencies = $WOOCS->get_currencies();
      $rate = $currencies[$currency]['rate'];
      foreach ($rates as $key => $item) {
          $rates[$key] = $item / $rate;
      }
  }