Add unitary price into select variation

Add unitary price into select variation.php

<?php

/*
 * Add unitary price into select variation
 */

add_filter( 'woocommerce_variation_option_name', 'display_price_in_variation_option_name' );

function display_price_in_variation_option_name( $term ) {
    global $wpdb, $product;

    if ( empty( $term ) ) return $term;
    if ( empty( $product->id ) ) return $term;

    $id = $product->get_id();

    $result = $wpdb->get_col( "SELECT slug FROM {$wpdb->prefix}terms WHERE name = '$term'" );

    $term_slug = ( !empty( $result ) ) ? $result[0] : $term;

    $query = "SELECT postmeta.post_id AS product_id
                FROM {$wpdb->prefix}postmeta AS postmeta
                    LEFT JOIN {$wpdb->prefix}posts AS products ON ( products.ID = postmeta.post_id )
                WHERE postmeta.meta_key LIKE 'attribute_%'
                    AND postmeta.meta_value = '$term_slug'
                    AND products.post_parent = $id";

    $variation_id = $wpdb->get_col( $query );

    $parent = wp_get_post_parent_id( $variation_id[0] );

    if ( $parent > 0 ) {
         $_product = new WC_Product_Variation( $variation_id[0] );
		$min_unit_price = $product->get_meta('_min_unit_price');
		 /*$price  = wc_price( wc_get_price_to_display( $product, array( 'price' => $min_unit_price ) ) );
        $price .= ' <span class="prefix" style="font-size:11px;color: #666;text-align: center;">'.__('Prezzo Unitario').'</span>';*/
         return $term . ' (' . wp_kses( woocommerce_price( $_product->get_price() / $term ), array() ) . ')';
    }
    return $term;
}