Ajay and Balu started a business together by investing some money. At the end of the first year, out of a total profit of र2000, Ajay received र400 more than Balu. If Ajay had invested र6000 more and Balu had invested र6000 less, Ajay would have received 25% more than what he actually received. What would have been the profit share of Balu, if Ajay's investment and Balu's investment had been less by र3000 and र7000 respectively, and the profit had decreased by 20%

1) 400
2) 440
3) 480
4) 520