Note: Full amount has already been adjusted from the excess money received at the time of application therefore, no amount shall be received on allotment.
Excess money received on application (1,000 x Rs.3) = Rs.3,000
Money due on allotment from anupam (1,000 x Rs.3) = Rs,3,000
Therefor anupam has already been paid the complete amount on application
Note: as per this Question correct allotment money is Rs,3.
While according to the book Question is allotment money is Rs.4.