FOX - Currency Switcher Professional for WooCommerce

Plugin URL: https://woocommerce.com/products/ups-shipping-method/

• to your current child wp theme file functions.php add next code:

  add_filter('woocommerce_shipping_ups_check_store_currency', function ($alow, $currency, $xml, $_this) {
      return false;
  }, 99, 4);
  
  add_filter('woocommerce_shipping_ups_rate', function ($data, $currency, $xml, $_this) {
  
      if (class_exists('WOOCS')) {
          global $WOOCS;
          if ($WOOCS->is_multiple_allowed) {
              $current = $WOOCS->current_currency;
              $currencies = $WOOCS->get_currencies();
              $def_currency = $WOOCS->default_currency;
              if ($current != $currency && isset($currencies[$currency])) {
                  $rate = $currencies[$currency]['rate'];
                  $data['cost'] = $data['cost'] / $rate;
                  $data['cost'] = $WOOCS->woocs_exchange_value(floatval($data['cost']));
              }
          }
      }
  
      return $data;
  }, 99, 4);