We know Buyer, their address, etc. Buyer calls in with a purchase request. Company captures buyer's name, address, requested goods, etc. Company gives buyer information on goods, prices, delivery dates, etc. Buyer signs for order.
Company creates order, ships order to buyer.
Company ships invoice to buyer. Buyers pays invoice. Buyer may use phone in, fax in, use web order form, electronic interchange 7. We know Buyer, their address, etc. Success End Condition Buyer has goods, we have money for the goods.