Add element near attribute value

Hi I have a need, I would like to add a code to make some calculations that I would like to get the variation out next to it and not below, I managed to put it below, however when I change the management of the radio button it doesn’t work, what I would like is as it comes out on this site

https://tipiliano.com/shop/caffe/cialda-ese-44/borbone-cialda-carta-miscela-rossa/

the radio button code of the variation swatches plugin is

return sprintf( ‘

                <li %1$s class=”variable-item %2$s-variable-item %2$s-variable-item-%3$s %4$s” title=”%5$s” data-title=”%5$s” data-value=”%6$s” role=”radio” tabindex=”0″>

                <div class=”variable-item-contents”>

               ‘, wc_implode_html_attributes( $html_attributes ), esc_attr( $attribute_type ), esc_attr( $option_slug ), esc_attr( $css_class ), esc_html( $option_name ), esc_attr( $slug ) );

            }

my current php function is:

function custom_sale_price_html( $price, $product ) {
if ( $product->is_on_sale() && is_product() ) {
$regular_price = (float) $product->get_regular_price();
$sale_price = (float) $product->get_sale_price();
$percentage = round( ( $regular_price – $sale_price ) / $regular_price * 100 );

    // Ottieni la descrizione del prodotto
    $product_description = $product->get_description();

    // Trova la quantità dalla descrizione del prodotto (assumendo che sia nel formato "Quantità: X")
    preg_match( '/Quantità: (\d+)/', $product_description, $matches );
    $quantita_per_cialda = isset( $matches[1] ) ? intval( $matches[1] ) : 1;

    // Calcolo del prezzo per cialda
    $prezzo_per_cialda = $sale_price / $quantita_per_cialda;

     $price = '<ins> ' . wc_price( $sale_price ) . '</ins> 
     <span class="ls_test_regular-price"></span> 
    <del>' . wc_price( $regular_price ) . '</del> 
    <span class="ls_test_percentage"></span>
    <span class="onsale">' . $percentage . '%</span>
    <br>
    <span class="prezzo-per-cialda">Prezzo per cialda: ' . wc_price( $prezzo_per_cialda ) . '</span>';
}
return $price;

}
add_filter( ‘woocommerce_get_price_html’, ‘custom_sale_price_html’, 10, 2 );

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