Offer a free domain registration/transfer and free renewal (if product is renewed)???

Hi,

How to 'Offer a free domain registration/transfer and free renewal (if product is renewed)'?

If I tick 'Require Domain', order cannot continue if customer choose 'I will use my existing domain and update my nameservers'.

If I not tick 'Require Domain', if customer buy a package with free new domain, domain price will still be added to total price when checkout.

In product setting, i've tick 'Offer a free domain registration/transfer and free renewal (if product is renewed)'.

In 'Domain Registration Options' under General Setting, under Domain's tab, I've tick all 3 options which is;

Allow clients to register domains with you

Allow clients to transfer a domain to you

Allow clients to use their own domain

Please advice, thanks.

This is how I set it up (see attached file);