Internet shop customized order form. Cart modification

Website, internet store is [login to view URL] It already has customized function to be able to drag url of items form Tmall, [login to view URL] and mobile versions of these sites. It drags size, color and price, converts it into Rubbles according to my rate and translates the options of the item into russian. then the customer can place the item into the cart and the cartcalculates the total including thу price of shipment to Russia from china according to the weight defined by customer and the price. The targets for improvement are: 1. the site does not drag the discount , it takes only INITIAL PRICE. Target - my store should drag the price with discount as here the initial price is 397 and with discount is 277 yuan the price dragged as price to the store should be 277 (here it is VIP discount and any other discount works same way If it is VIP discount than it drags the top price (13-15 - the price dragged is 15) As here [login to view URL] 2. Price varifies depending on size, color or item modification as here: [login to view URL] - different option - different price dragged 3. The site can drag the picture of the item and reflect it near the item description. Picture as on the main item page is enough. The picture is kept when the url is placed into the cart too. 4. The site should drag inside china shipment cost. shipment cost should be taken EMSto this destination in china (there is a choice, see attached picture #1, and the shipment cost changes depending on the province and the city of the receiver. Please, see the attached pictures of the choice of province and city.) 5. If several items of one purchase of the customer are from same seller (seller can be seen here, see picture#2 attached) then only once shipment within china is charged for the storing the cart, for example 3 items are taken form same store here: [login to view URL] the ems then placed into the cart only with one item and equals 20 yuan for all 3 itrms shipment cost can be added to any of the items in the cart , first or last item of the 6. After the urls are placed into the cart, and the order is confirmed by the client, there should be a possibility to export data into the excel file form (attached). Also the administrator can delete n fields leaving only url size color and additional details fields and item name. for all the information about the price and shipment and weight will be seen in the pdf file attached later. 7. After the purchase is paid or at some time after the order is confirmed there should be a possibility to attach a PDF file into the order history directory. Pdf file can be replaced by other pdf file by administrator at any time.