When an employee needs a work-related item, the employee will send a purchase request to the purchasing agent. The purchasing agent uses all of the requests received for the week to create a Purchase Order. Items can only be purchase from approved vendors so she first retrieves the approved vendor list from the vendor file to determine which vendor should be used for each item requested. She then creates one purchase order (PO) for each vendor. She copies each PO, sends the original to the vendor and files the copy in the Open PO file (filed by vendor). When a shipment is received, the clerk notes the vendor name and retrieves the correct PO from the open PO file. The receiving clerk unboxes the items, inspects each item, and creates a receiving report. He then agrees the PO and the receiving report and notes any discrepancies. He checks the "Received" box on each line of the PO where the quantity matches the amount on the receiving report and attaches the two documents. If all of the PO items have been received, the clerk initials the PO then files the documents the completed PO file, otherwise they get filed again in the open PO file. When the vendor sends the invoice (vendors will not send an invoice until all items are shipped), the accounts payable clerk retrieves the corresponding documents from the appropriate file (you should specify which one in your diagram). She calculates the amount owed to the vendor based on the receiving report, writes a check for that amount, writes the PO number on the check, and sends the check to the vendor. She then marks the invoice the invoice as paid, attaches it to the other document, and files the documents in the paid invoice file. Processes Input/Output Storage Miscellaneous Terminator (start/end) Computer Document disk Paper file Off page connector Manual Display Batch total Tape On page connector Computer entry