To set a shipping cost depending on a products number:
- Log in your administrator panel and open the Shipping methods page (the link to this page
is in the SHIPPINGS/TAXES side box on the left of the page).
- Create the shipping method or choose the existing one.
- Click on the Edit button of this shipping method. The Shipping method properties page will be open.
- On that page select the desired destination in the Show rates for destination: box and click on its link.
- In the Items dependences section enter 0 (for instance) into the More than input field and shipping cost for one item into the Rate value input field, select the check box in the Per Item column.
- Click on the Update button at the bottom to save the changes.
NOTE: In this case the shipping cost for two items will equal the shipping cost entered in the Rate value input field multiplied by two.