On 1^st September 2020, Mr. Guava make an advertisement in the newspaper to sell his apartment with the price of RM150,000. In the advertisement stated that anyone who interested to buy the apartment may contact him for further negotiation and price quotation. A few hours after that, Miss Grape call Mr. Guava and ask for the apartments details and the lowest price Mr. Guava able to offer her. Mr. Guava reply to Miss Grapes request and the apartments lowest price will be RM145,000.

Mr. Guava and Miss Grape come and see you for advice as to whether they can sue each other for breach of contract. Support your answer with Contract Act 1950 and decided cases.