Bundled Item Shipping

This feature allows you to set shipping rates for bundled items. Bundled items are those that are sold in multiple quantities, and as singles.
For example:
You sell paper cups in packs of 50, and individually. You could specify that if a customer purchased 50, then shipping would be charged according to the bundled rate and not the single rate.
If a customer purchased 51 cups, then they would receive the bundled rate for the 50, added to the single rate for the extra cup.