Mahesh and Umesh purchase a radio each for the same price and both mark up their respective radios by the same amount. Mahesh gives a discount of Rs.20 followed by another discount of 20% on the reduced price, while Umesh gives a discount of 20% followed a discount of Rs.20. If Mahesh's profit percent is equal to thrice Umesh's loss percent, The profit (in Rs.) of Mahesh on his radio is :