Which offer is a firm offer? -A. Sample 1 B. Sample 2 2.According to the firm offer, how long will the offer remain valid? -It will remain valid for__________ days 3. In sample 2, if the offer is accepted, how much should the buyer pay for this order at least regardless of the freight? -The offerer need pay________dollars at least. 4. Are the two samples E-mails or letters? -A. Emails B. Business letters 5. In sample 1, what is attached? 6. In sample 2, when should the goods be shipped if the offer is taken? -In ___________