This assignment analyzes the legal aspects of contract formation in business law, specifically whether a valid contract has been established between Emily and Kleencare Sdn Bhd for the RM500 promised in their advertisement. The Contract Law 1950 governs the contractual relationships in Malaysia, and certain elements must be established to form a contract. The advertisement posted by Kleencare Sdn Bhd is considered as a unilateral contract, and Emily can legally claim an RM500 from Kleencare Sdn Bhd because a valid contract has established between parties.