In a sports goods shop, the marked price of a bat is 40% above the cost price and that of a ball is 60% above the cost price. The cost price of a bat is 5 times the cost price of a ball. The profit earned on selling a bat is 20%, and 25% when a bat and a ball is sold together. If the profit earned on selling a ball is Rs. 50, find the discount given on a bat.