The acceptance of an offer must be unqualified - in accord with the exact terms of the offer. If A says to B: "I will sell my farm for $10,000," and B says: "I will consider your offer, but I offer you now $8,000 for the farm," it is held that this is a rejection of A's first offer and a new offer by B to A. B could not afterwards say to A: "I accept your offer to sell me your farm for $10,000" and force A to sell it to him. The acceptance must be communicated to the person who has made the offer, and in the manner which he had intended. Where an offer is made by mail it is natural to suppose that the acceptance is to be made by mail and, unless some other method is expressly specified, the acceptance becomes binding as soon as it is mailed. A person cannot force another person to accept or refuse an offer; for instance, A cannot say to B: "I have shipped you certain goods at certain prices, and if I do not hear from you will consider you have accepted them." B is not bound to notify A he will not take the goods; this is a convenience, for it would be a hardship to allow manufacturers or others to ship goods to anybody without request and then say that unless the other party notified them he would have to pay for the goods. Where an offer is made to a specific person, only that person can accept. If the offer is to the public in general, then any member of it who does what is asked for becomes a party to the contract. Sometimes an offer says: "Reply by return mail." This does not mean the first mail that goes out, but a letter posted on the day the offer is received.