definiens: means the number of individual donations of blood, plasma or other blood components that are tested for Blood Screening by End Users through the use of a CHIRON Licensed Product . In the event that ROCHE or its Affiliat es perform assays for commercial purposes utilizing CHIRON Licensed Product, Units shall include the number of individual donations of blood, plasma or other blood components that are so tested by ROCHE or its Affiliates . Notwithstanding the foregoing, Uni ts shall not include those CHIRON Licensed Products used by or for End Users at no charge by ROCHE for ( A ) reasonable quantities of quality control or evaluation testing or ( B ) replacement of defective goods . In the case of pooled blood samples tested thro ugh the use of a CHIRON Licensed Product, refers to each individual donation of blood, plasma or other blood components that is represented in the tested pool, regardless of the number of times such donation is tested