A wrote to B offering 300 bags of cement at 10 per bag. B wrote in reply that she was very interested but needed to know whether it was Premium Quality cement. The following morning, soon after A read B's letter, B heard a rumour that the price of cement was about to rise. She immediately sent a fax to A stating, 'Accept your price of 10 for Premium Quality'. Assuming that the cement actually is Premium Quality, is there a contract? If so, does the price include delivery? Explain your reasoning.