Sam was instructed by Beng to sell a piece of land in Dungun.He was promised a remuneration of RM2000.While performing his duties, Sam incurred expenses amounting to RM950.Sam also received RM3000 as a deposit from the buyer of the land but it had not been handed over to Beng.After the completion of the transaction, Beng refused to make any payment to Sam.Advise Sam.