Build an Online Store with necklace design tool

Feature we need developed: -- Middle of page where designing will take place: Design board This is the design board. [login to view URL] [login to view URL] [login to view URL] -- Right of page: -- Thumbnail images with name, price, and size of each available piece of jewelry (beads, gold and silver pieces, closing pieces for necklace, etc.)). -- This will probably be scrollable because there are probably a few hundred different kinds of pieces -- From here, people can drag any piece to the Design Board -- Designing -- Drag and drop and rearrange pieces on the Design Board -- Add more of a particular piece that's already on the Design Board without having to find it again among the thumbnail images on the right -- Drag to remove any piece from the design board -- View design with their own photo -- People can upload their photos to appear behind the design board -- Toggle Design Board to be visible / invisible, but the necklace always to be visible, so it will look like it's hanging on their neck on their own photo -- Drag and position either the jewelry or their own photo to position necklace at the right place on their neck (photo) -- Prices -- Price to calculate based on number and price of each piece used int he design (doesn't have to automatically show each time when a piece is added, but maybe "update price" button or some solution like that -- Add production fee (determined by the website) to the price -- Add shipping and taxes before checkout -- Buy other items -- People can also buy any piece of jewelry pieces (and other products) without making a design -- Shopping cart (currently no shopping cart) -- Checkout (currently no checkout) -- Currently no admin panel -- Autoresponder to their email address to confirm order with order number generated at checkout