In "Retail: Discounters Get Their Day, Business Week, January 14, 2002, the authors suggest that consumers will try to stretch their dollars. So discounters and value-oriented retailers such as Wal-Mart Stores Inc. and Target Stores will continue to take market share away from mall-based department stores and specialty stores. The authors also suggest retailers will have to keep an eye on inventory and other expenses." How could an excessive build-up of inventory hurt a retailers bottom line?