Initial bank balance = Rs 5000;
Total deposits: January : Rs 2000; March : Rs 1000
Total deposits upto March = Rs 5000 + Rs 2000 + Rs 1000 = Rs 8000
Amount withdrawn: February : Rs 700 (-) March : Rs 500 (-)
∴ Total amount withdrawn = (-700) + (-500) Rs -1200
Net bank balance = Rs 8000 – Rs 1200 = Rs 6800