Pressure Drop Adjustment

We are working on a Project with a central 100%OA AHU. We calculated the pressure drop adjustment for the baseline Systems 7 following ASHRAE 90.1-2007 table G3.1.2.9. Now we received the following review comment: "The Baseline fan power calculations indicate that a pressure drop adjustment factor has been applied to the total supply air volume of each system in the Baseline model to reflect the high efficiency filters included in the actual design; however, the high efficiency filters only filter the outdoor air volume provided by the dedicated outdoor air systems in the actual design. Revise the Baseline model, as needed, so the pressure drop adjustment factor associated with the high efficiency filters is applied to the total outdoor air volume only, not the total supply air volume, in the Baseline model. Further, update Table 1.4.2 and provide revised fan power calculations reflecting the changes." In our understanding, the review team wants a differentiation between OA and Return Air of System 7 for the pressure drop adjustment calculation. ASHRAE 90.1-2007 G3.1.2.9 definition for the calculation is "the baseline system maximum design supply fan airflow rate". Now it is unclear if the review team is wrong with their comment or if we have to make a differentiation of OA and return air. Any ideas? Thank you in advance!