110It follows from all of the foregoing that, in the first place, in order to determine the basic amount of the fines to be imposed, first, for all the cartel participants, with the exception of Elna and Nippon Chemi-Con, the Commission used the criterion set out in point 13 of the 2006 Guidelines, taking into account the value of sales achieved during the last full business year of their participation in the infringement. Second, the Commission calculated separately, for all the cartel participants, the relevant value of sales of the two categories of products concerned, namely aluminium electrolytic capacitors and tantalum electrolytic capacitors (see paragraphs 102 and 103 above).