Product Bundles for WooCommerce

When a Product Bundle is set as Unassembled, then this means that the container item is not shipped and is treated as a Virtual product – instead, the items included in the Bundle are shipped individually.
A Flat Rate shipping percentage fee will therefore not apply to the container Bundle item that costs $10, but only to the bundled items.
If those bundled items are not priced individually, however, they cost $0, meaning that flat rate percentage fee claculations do not work on these items.