Handle weighted-item (catch-weight) pricing adjustments in a grocery delivery order fulfillment flow

Steps

1. Identify weighted items in your product catalog (e.g., deli meats, fresh fish, produce sold by weight) and flag them with a variable-weight indicator in your catalog data
2. At order creation, record the customer's requested nominal quantity (e.g., approximately 500 g of ground beef); store both the nominal weight and the unit price per weight used to estimate the initial charge
3. During picking, capture the actual measured weight of the item as scanned or entered by the shopper or fulfillment system; compute the adjusted line-item price as actual weight multiplied by unit price
4. Submit the actual weight and adjusted price back to the fulfillment or order-management system before the order is finalized for payment capture; use the platform's item update or order-adjustment API if available
5. Ensure your payment flow captures only the final adjusted amount based on actual weight, not the estimated amount shown at checkout — communicate the adjustment to the customer before or at time of charge
6. Surface the per-unit-weight price prominently in the customer-facing UI so expectations around final charge are set correctly at the time of ordering