What does the "Converting" part represent?

This % is a rough estimate that was based on the production of an unprinted box. It can/should be overridden by the user editing/creating a model to reflect the real converting cost % (the Index Builder user should get back with the supplier). Converting cost is fixed over time in the IB model - we understand that these costs do change somewhat, however, the goal of IB is to track the effects of changes in prices or costs of the main materials used in making the end product (packaging).