QC Kentei (Quality Control Examination) Level 3 Correspondence Course Textbooks, Exercise Problem Collection, and Past Exam Collection All items are like new, having only been glanced through. There are no markings or writings. Kogaku Correspondence Education Co., Ltd. QC Kentei Level 3 Breakthrough Course - 2 Textbooks (Textbooks only. No tests included.) (Correspondence course originally 22,520 yen) QC Kentei Level 3 Practice Problems and Solutions Published by Nikka Giren (Japanese Standards Association) 2,310 yen Pass QC Kentei Level 3 with This One Book: Exercise Problem Collection Denkishoin Publishing 1,430 yen Thank you.