Build an Online Store - Umbraco 7.1

Hi, we are building a website using Umbraco 7.1 and need help with the eCommerce section of the site. The functionalities that i need you to build are: Admin: • Product category management (add/edit/delete). E.g. Camcorders, Scanners, printers, etc. • Product management (add/edit/delete). Each product can have multiple variants with different pricing each. E.g. Camera Red (price $500), Camera blue (price $100) and so on. • View orders and associated customer details, and mark complete • VAT will be added globally (20%) • Shipping will be added globally - flat rate for now End user: • Standard shopping cart features: add to basket, update basket (delete items, update quantity), basket count • Enter Address details • Order preview page – to list the order and address details • Payment option: currently only PayPal. Therefore we will a way to change IPN and PayPal account settings as required for dev and live site – happy to have this in code. • Use normal PayPal checkout – i.e. redirect the user to PayPal site for payment. • Once the payment goes thru, mark the order a paid – this requires a PayPal “IPN” page on the site which when called by Paypal takes the unique id from paypal and marks the order to complete/paid. Ideally we’d like to use Merchello as the Shopping cart provider – as that plugin is open source and it has the features listed above already built in. But if you have a custom solution that is easier to implement and flexible enough (for future), we are open. Don’t worry about html – we will do it. We just need the core functionality. We will give you full access to the development site including FTP. Hopefully this covers it all. but any questions please contact me. thanks pritam