Enter a number in the quantity box. Clicking on the link launches a pop-up window with a table of shipping charges.
Shoppers can thus easily return to their shopping cart when they're finished reviewing the chart.
Unfortunately, the shipping charge table includes a typographical error. Realgoods should correct this error right away so as not to confuse customers and allow them to better benefit from the window. See the Talk Back comment below from the Realgoods Web team. We still find it useful to display and discuss these features, though, since our aim is to learn from the good or bad design of the feature, regardless of when it was live on the site. In ranking a site, we use a specific methodology .