Which flowchart synboles should be use for all the steps ?

Sales Process Flowchart Sales Clerk received a customer order Prepares sales order & forwards to Warehouse Clerk Accountant 1 Customer through mail Prepares packing slip & ships the items Approves the credit & prepares invoice and sends to Collection Clerk Accountant 2 Posts entry in sales journal & A/C Receivable ledger Matches approved sales order with invoice & files customer number