Abdullah who leaves next door to Saleem went to Saleem's house proposing to sell his Proton Saga for RM 15,000 to be accepted by 5 September 2019. On 3 September 2019, Abdullah sold the car to Ubaidullah and sent a letter to Saleem revoking his proposal. The letter reached Saleem on 10 September 2019. On 6 September 2019, Saleem telephoned Abdullah accepting the proposal. Abdullah said that he has already sold his car. Advise Saleem.

This unit is called Malaysian Business Law. So please use English or/and Malaysian cases. Any laws or statutes come from the Contracts Act 1950. IRAC method is required