Build an Online Store with Django CMS / python / javascript

hi, i need a simple webshop written in django cms (please no PHP). there are two products, customers should be able to do the following 1) normal website appearance with some navigation (home, about us, products, support, login) 2) should be able to login ( (make a signup for new user, or an existing user login with terms of conditions check)) 3) if logged in they can see two additioanl options in the nav bar a) documentation b) download if b) download is selected, then the customer can choose two items (A) and (B) both items/producst A&B can have different quantities. the webshop should also check how many items are ordered (item A three times and item B 5 times). Item A and B each have a price of 99 cents, customer can choose the quantity and the webshop will calculate and add vat to it and then do a "add to chart" action. 4) customer should be able to pay with paypal, billing or credit cards. 5) it should be a responsive site (if mobile device then CSS files should change to a mobile format) thanks