CG NAT

mohamadhosein I believe this is highly dependent on multiple pieces of data in addition to how many users you have. From my understanding this is an add-on to the LTM license and is supported by all of the F5 chassis both physical and virtual. I think your best bet on this one might be to open a ticket with F5 or call the sales individuals to be provided a more accurate answer to your query as well as an understanding of the cost as well.

mohamadhosein  as Paulius points out, more information is needed in order to answer your question. AubreyKingF5 has a background in SP and may have better words of wisdom, but I think the best bet is to reach out to F5 Sales with an enquiry.