D. all of these are value-added activities Mendelsohn company keeps 20 days of materials inventory on hand to avoid shutdowns due to materials shortages. Carrying costs average $4,000 per day. Bach, Inc., a competitor, keeps 10 ays of inventory on hand, and the competitor's carrying costs average $2,000 per day. What are he value added costs? A. $0 B. $40,000 C. $20,000 D. $80,000