Shopping Cart in php with ajax

We require to build a shopping cart exactly like this [login to view URL] you can copy the design, i don't mind. All the features will be same. But product page will be different with following features.... Back end Every product will have different varieties. Each variety will have different quantity and cost. Category and product adding will be done either through CSV upload or from admin One product can be listed in more than one categories Front end Check attachment to have exact idea about how product listing will display. User selects variety from drop down list and clicks on 'Show Cost'. System (ajax) will load table of costing for that particular variety. All the costing will display if user selects 'All'. Three buttons will be inactive if 'Add to Cart' button is active. When user clicks 'Add to Cart', rest three buttons get activated and 'Add to cart' becomes inactive. If user clicks 'Remove' then 'Add to cart' will get active and rest three will become inactive. All the communications, file transfer and transaction will only be done through freelancer.in (we had very bad experience in this). Its your problem if your account gets blocked by freelancer and don't contact us for payment. Do not ask for personal email or contact number. Payment will be released only when you complete project on your server. type 'I am ninja developer' if you have gone through all the provided details.