URGENT HELP PLEASE ! :(

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.

Is this under 'To pay his principal all sums received on his behalf s.170' ?