Shopping cart rewrite for adult content site

Hi All, I have a project about shopping cart. Complete requirement specifications are in attachment. Please find the attachment for same. Please review proper and send a proposal indicating that you have read and understand the document and can meet our requirements, examples of your work, and a cost/budget estimate. Then after I will review your submissions and hope to have a selection made before the end of this week, with work starting immediately. Please let me know​​ ​in details ​if you have any questions or need clarification on anything.