From the Rhino's site -
Match tickets are priced £18 for adults and £13 for concessions* in all standing terraces including the South Stand. Seated tickets are £25 for adults and £18 for concessions* for a seat in the South Stand or Extentia Stand (formerly Carnegie Stand).
Remember, if you’re a Season or Supporter Member you get a £3 discount on these prices if you book in advance (discount is not valid on match day).
Cash turnstiles will be available on St Michael’s Lane and Kirkstall Lane on match Day for entry to the Extentia Terrace (formerly Carnegie Terrace) or West Terrace only. The South Stand turnstiles will be open for South Stand match ticket holders only.