What type of cross-docking does Walmart use? Pure or hybrid cross-docking? What are the advantages of hybrid cross-docking over pure cross-docking (discuss at least two points)? 2. Does Walmart use pre-distribution or post-distribution cross-docking? Why? 3. What is the difference between "staple stock" and "direct freight"? Discuss. 4. Why can't they ship staple stock items in the same way they ship direct freight and avoid the holding cost?