title: Replace zero cost to "Free" from WooCommerce shipping method full label
body: <p>To display the shipping cost when it's equal to zero I am using the following code <em>(because woocommerce hide zero cost for shipping methods)</em>:</p>
  <pre><code>add_filter( 'woocommerce_cart_shipping_method_full_label', 'custom_add_zero_cost_to_shipping_label', 10, 2 );
     
  function custom_add_zero_cost_to_shipping_label( $label, $method ) {
      // if shipping rate is 0, concatenate &quot;: $0.00&quot; to the label
      if ( ! ( $method-&gt;cost &gt; 0 ) ) {
          $label .= ': ' . wc_price(0);
      } 
   
      // return original or edited shipping label
      return $label;
  }
  </code></pre>
  <p>How can I change this code to display <strong>&quot;Free&quot;</strong> instead of displaying <strong>$0,00</strong> <em>(zero cost)?</em></p>
  <p>Is this possible with a tweak on the below code?</p>