There is no public cost for the item you have above. I have checked every corner of the website, and the only way to acquire information related to price is through contact. Use the information below to get in touch with the developers and they will provide all the necessary data.
General enquiries Johannesburg 087 350 1730
Account queries – existing customers 0861 000 931
Email Address firstname.lastname@example.org
General enquiries Durban 087 353 8231
Contact page: http://www.mathsace.co.za/pages/contact-us
Terms and Conditions file: http://www.mathsace.co.za/upload/tc.pdf