Already enrolled in Walmart WFS but still paying a separate 3PL for your Shopify orders? You don't need to. Walmart Multichannel Solutions (MCS) lets you use your existing WFS inventory to fulfill Shopify orders automatically — no duplicate storage fees, no manual tracking. This step-by-step guide shows you how to set it up in under 30 minutes using FOV — the dedicated Walmart WFS & MCS fulfillment app for Shopify.