a salesman ` s commission is 5 % on all sales upto rs . 10000 and 4 % on all sales exceeding this . he remits rs . 31100 to his parent company after deducing his commission . find the total sales .  Choose the correct choice from the following options
A) 32500  B) 2500  C) 22500  D) 30000  E) 40000

Rationale: let his total sales be rs . x . now ( total sales ) – ( commission ) = rs . 31100 x - [ ( 5 % of 10000 + 4 % of ( x - 10000 ) ] = 31100 x - [ ( ( 5 / 100 ) * 10000 + ( 4 / 100 ) * ( x - 10000 ) ] = 31100  x - 500 - ( ( x - 10000 ) / 25 ) = 31100  x - ( x / 25 ) = 31200  24 x / 25 = 31200  x = [ ( 31200 * 25 ) / 24 ) = 32500 . total sales = rs . 32500 answer a
Answer: A