add shipping costs to woocommerce checkout summary

function woocommerce_cart_shipping_method_full_label( $label, $method ) {
  $label .= ' - ' . $method->cost . ' ' . get_woocommerce_currency_symbol();
  return $label;
}
add_filter( 'woocommerce_cart_shipping_method_full_label', 'woocommerce_cart_shipping_method_full_label', 10, 2 );