Invoicing design and Analysis _ overall (1) __ Logistics

From the overall flow chart, invoicing is divided into two forms: logistics and money flow,
Logistics: Purchase orders-> purchase into warehouse orders (purchase returns)-> warehouse, disk surplus into the warehouse-> warehouses, transfer into the warehouse-> warehouses, sales orders-> sales order (sales return)-> warehouse, disk loss out of warehouse-> warehouses, transfer out of warehouse-> warehouses
Stream: Prepayment, payment slip, advance receipt, receipt list

So how does inventory count? Inventory = input-out, input is: Purchase into warehouse orders-purchase return orders + disk surplus into the Warehouse + transfer into the warehouse, then the list is: Sales orders-Sales return orders + disk loss out of warehouse + transfer out of the warehouse

How would the accounts Payable and receivables be calculated? payable = Purchase into warehouse order-(Advance payment + billing). Receivables = Sales Orders-(advance orders + receipts)

Because I only example simple invoicing, does not involve the commodity to report the loss, the commodity borrows (borrows to return), the commodity borrows (lends out returns), the merchandise deposit (return) and so on does not have the example