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Enter purchase order. Arrow down to Awaiting Supplier Ack. with last status code 220 and next status code 245. Arrow down to Awaiting Ack. Approval with last status code 245 and next status code 300. Arrow down to Awaiting Shipment with last status code 300 and next status code 370. Arrow down to Record Purchase Receipt with last status code 370 and next status code 400. Arrow down to Complete - Ready to Purge with last status code 400 and next status code 999.