Amount invested:
= cost of each share *number of shares purchased
=(50+100)×200=Rs.30,000
Net income of Mr. D’souza:
= total money received on selling 200 shares + total dividend received – total brokerage paid on 3 trades
=[(50−10)×100+(50+75)×100]+200×(50100×50)−(20×3)
=4000+12,500+5000−60
=16,500+5000–60
=Rs.21,440
Since the net income of Mr. D’souza is less than the amount invested, so Mr. D’souza incurred a loss.
Loss incurred = Amount invested – Net income of Mr. D’souza
=30,000–21,440=Rs.8560
Thus, Mr. D’souza incurred loss of Rs.8560