Artist retains all copyrights - there is NO charge.
Personal - Client accepts that the drawings are done for a personal (non-profit) purpose and that the prints etc will not be sold for profit.
Business/Professional copyrights - the client acknowledges that he/she for all purposes plans on making prints (or other merchandise for sale that will include the artists drawing) and by purchasing the full copyrights to said drawings they understand and realize that the artist has NO MORE claim to such drawing.