Wordpress e-Commerce Shopping Cart Configuration
Shipping modules provide shipping rates during checkout based on weight, destination zip code and/or other criteria that is added to the running total of the cart.
Examples of shipping modules:
UPS (United Parcel Service) USPS (United States Postal Service) FEDEX (Federal Express)
More about Shipping Modules
A payment gateway is a method for receiving payment through the shopping carts. Payment gateways are utilized on the "Checkout" page of the Wordpress e-Commerce shopping cart plugin (WPSC).
Examples of gateways:
PayPal Authorize.net (Direct Credit Card transactions)