On 1st April, 2018, an existing firm had assets of Rs. 5,00,000 including cash of Rs. 25,000. The partners capital account showed a balance of Rs. 3,50,000 and reserve constituted the rest. If Normal Rate of Return is 10% and goodwill of the firm is valued at Rs.?1,32,000 at four years purchase of super profit, find average profit per year of the existing firm.