function reset_price_fields

function reset_price_fields( $hook ) {
    if ( 'edit.php' != $hook ) {
        return;
    }
    wp_enqueue_script( 'my_custom_script', get_template_directory_uri( __FILE__ ) . 'cancella_prezzi_2.js', array(), '1.0' );
}
add_action( 'admin_enqueue_scripts', 'reset_price_fields' );