WooCommerce - show cents within a sup tag

<?php
  // WooCommerce - show cents within a sup tag
  add_filter( 'wc_price', 'my_price', 3, 60 );
  function my_price( $return, $price, $args ) {
    // $return = price with currency symbol
    // $price = price as a number
    // $args = array (inc tax, exc tax)
    $price = str_replace( ',', '', $price );
    $dollars = intval( $price );
    $cents = intval( ( $price - $dollars ) * 100 + 0.0001 ); // add a little bit for rounding errors
    // ensure $cents has 2 characters
    $cents_str = str_pad( $cents, 2, '0' );
    return '$'.$dollars.'<sup>'.$cents_str.'</sup>';
  }