This level of e-commerce fully automates the transaction between you and your customer. 

• Automated Shipping Costs - Upon placing an order, shoppers select a preferred method of shipping so that it's cost is automatically built into the total
• Automated Payment -  Payment method (generally credit card) is requested and processed automatically via one of several available processing services.
• No Telephone Expenses - There is no need to contact the customer unless you do not have sufficient stock to fill the order.¹

Note that with this level of automation, you will incur some monthly expenses that you need to know about.  With credit card transactions, your web server needs to support additional security protocols for transmitting the credit card information in an encrypted form.  Getting this level of service is a cost that is controlled by your web hosting provider.  Additionally, credit card processing services will want compensation as well.  Usually it's a few percentage points of the total cost of the sale.

¹If the number of items you sell on line is not very large, you could easily maintain an inventory online (via the administrator page) so oversells will not happen.  Clearly, for larger inventory levels, this would mean a lot of updates to your website.  In the situation where you would like to maintain inventory online and you have a large volume of catalog items, we can custom build a small application which will synchronize your online catalog inventory levels with your current in-house inventory package.