The links listed above are examples of catalog designs for ecommerce websites. You may go through placing orders as the shopping carts are integrated with actual Google Checkout function. It will help you see the process and verify its functionality. Of course, there are seamless integrations where you can charge your visitors right on your website. Another way of processing transactions is to securely collect payment information on your websites and process the charges off-line using your point of sale tools.
Our ecommerce systems design is not limited to the retail markets. We also help out automating any ordering, purchasing, and inventory management. We have customers that use Quickbooks integrated with their shopping cart as well.