Listen to a passage and fill in the blanks. An (1 ) is a promise to supply goods on the (2 ) stated. It can be a (3 ) which is a promise to sell goods at a stated price, usually within a stated period of time or a (4 ) which is made without engagement and is subject to the seller’s confirmation. Usually an offer will include the following: 1) name of the goods, 2) (5 ),3)(6 ) , 4) details of prices , 5) discounts, 6) terms of payment,7) (7 ), and 8) packing so as to enable the buyer to make a decision. A buyer may reject the terms and conditions in the non-firm offer and (8 ) his own terms and conditions. This process of offer — counter-offer — counter-counter-offer is the process of (9 ).