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Dynamic Operation A good shopping cart program also creates dynamic order forms on the fly as the order takes place. The shopping cart should be totally dynamic; meaning it only executes code and retrieves products, images, and product descriptions from your database when your customers request it. During the checkout process it should also calculate shipping/handling and taxes for you.

Real-Time Credit Card Processing Powerful CGI, PHP, CFM, ASP, etc, scripting, processes commands for you on secure servers when your customers place their orders. Don't get this confused with credit card processing. What I'm speaking of here is the passing of your customers' order information from a secure form, to your merchant or payment processor, using one of the scripting languages above. Your payment processor or merchant, like PayPal, 2CheckOut, or Authorize.Net will then process the credit card. If you don't currently have a merchant or payment processor, and you are going to be selling online, then you NEED one.

Usability You can choose what options you want your customer to see. For instance, you can choose to display a search form on your shopping cart. A search form allows your customers to search your store for items by keyword or product name, etc. You can choose to display options like color, size and quantity, and even adjust the price based on the customer's selection. These are called options. Your shopping cart should also allow you to upload images of your products as well.

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