Adele and Bella are sisters. On 1st February Adele meets her sister for a drink and tells her she is looking for a new sports car. Bella replies that she wants to sell her red Ferrari as there is now a better model available and that she is happy to sell it to her sister 'on a business basis'. Bella says she wants 'about Ksh. 800,000' for it. That evening Adele sends an email to Bella saying, 'I accept your offer to sell the car for Ksh. 800,000 and will transfer the money in a few days.' On 3rd February Bella sends Adele an email that says: 'Don't be stupid I wouldn't sell the car for that, I want Ksh 950,000 for it. To avoid any further misunderstanding, do not email me again unless you do not want the car at this price.' Adele was so annoyed on reading the first sentence of Bella's email that she deleted it without reading further and did not reply. Three weeks later Bella rang Adele and demanded Ksh 950,000, offering to deliver the car. Advise Adele.