Show negative value in fee - compatible while having Currency switcher by villatheme

Show negative value in fee - compatible while having Currency switcher by villatheme

add_filter( 'wc_price', function ($return, $price, $args, $unformatted_price){
    if($unformatted_price < 0){
        $return = str_replace('<span class="woocommerce-Price-amount amount">', '<span class="woocommerce-Price-amount amount">-', $return);
    }
    return $return;
}, 11, 4 );