Value of 100 shares =40×100=Rs.4000.
Brokerage per share =0.5100×40=Rs.0.20.
∴ Cost of one share =MV+Brokerage
=40+0.20=Rs.40.20.
∴ Cost of 100 shares =40.20×100=Rs.4020
∴ Brokerage on 100 share =0.20×100=Rs.20
∴GST=18100×20
=Rs.3.60.
Bashirkhan paid Rs.4020+Rs.3.60=Rs.4023.60 for 100 shares.