Five traders were also given various prison terms.
Rab’s Executive Magistrate Sarwar Alam, along with the Rab-2 deputy commanding officer, conducted the drive at Boro Bazar of Jatrabari from 4am to 2:30pm on Saturday.
During the drive, the mobile court fined 31 traders and also sentenced five of them to jail.
The mobile court also fined another trader Tk 2 lakh for selling stale fish.
After the operation, wholesalers are selling onions at Tk 50 instead of Tk 67.