Shopping cart intergrated into two existing html sites

I need a PHP e-commerce shopping cart intergrated into two existing html sites. The cart needs to have a bank merchant fasility(gateway) for credit card and direct deposites. It needs to have pay pal intergration. It needs to have a database that will collects information such as the customers name address, email address phone number, items purchased, date purchased. I need to be able to send news letters to past customers. I want to be able to inerigate the database. I would like to have discount codes, so I can tailor a specific discount to a customer based on a customers specific action. The cart needs to have a sales chart.