Review the sales sequence with new customers, materials and quantities. An order records demand, a delivery organizes the shipment, goods issue changes stock, and billing creates the receivable. A document number at one stage isn't evidence that every later stage is complete. Read the requested endpoint before you act.
The tasks are independent and use prepared histories where a later stage is required. Check the order and delivery references rather than selecting a familiar number from an earlier task. A billing hold belongs to the order in these exercises. Releasing it needs the approval stated in the request. Use the report amount at the end to verify selling-price arithmetic without mixing it with inventory cost.