Z Ltd. made the first call of Rs. 30 per share on 15.1.2015. The last date of payment of call money was 31.1.2015. Mr. N, holding 50,000 shares paid the call money on 15.3.2015. The company had adopted Table F of Schedule I to the Companies Act, 2013, the amount of interest on Calls-in-Arrear will be _____.