Find the cash realised by selling Rs. 2440, 9.5% stock at 4 discount (brokerage 1/4 %)

By selling Rs. 100 stock , cash realised =  $Rs.100-4-\frac{1}{4}=Rs.\frac{383}{4}$  

By selling Rs. 2400 stock, cash realised = $Rs.\frac{383}{4}*\frac{1}{100}*2400$ = Rs 2298.