An offer was made by A to sell goods on the 1st April for £2,000. B the offeree telephoned A on the 5th April offering to pay £1,800 for the goods.On the 8th April, A offered to sell the goods to C for £1,900, and C accepted this offer on the same day. On the 7th April, B sent a letter to A which was received on the 10th April agreeing to pay the £2,000 asking price for the goods.Which one of the following is correct?