We would like to have the option to generate invoice items at the tier level, instead of generating one invoice item for all combined tiers. then we can show the customer their usage at each tier, their discount at each tier, and their price at each tier. We have also seen some rounding issues caused by lumping all the tiers into a single invoice item, since our business adds a back-end discount to these charges. A significant portion of our business requires this functionality.
