Adding superscript to wc_price filter . Working to all prices throughout the site.

wc-custom-functions.php

<?php
/**
** Adding superscript to wc_price <sup></sup>
** not working with prices into select2
**/
function custom_custom_price_format($return, $price, $args, $unformatted_price) {
	$elements = explode('.', $price);

	if(is_admin()) {
		return $return;
	} else {
		return sprintf( '<span class="woocommerce-Price-amount amount"><span class="woocommerce-Price-currencySymbol">%s</span>%s<sup>%s</sup></span>', get_woocommerce_currency_symbol(), $elements[0], $elements[1] );
	}
}
add_filter('wc_price', 'custom_custom_price_format', 10, 4);