Three products P, Q and R purchased at Rs. 300, Rs, 350 and Rs. 400 respectively. The profit percentage of P, Q and R is (a + 10)%, (a + 16)% and (a + 12.5)% respectively. The ratio of marked price of products P, Q and R are 45: 49: 70. If the discount percentage given on products P and Q is 20% and 10% respectively. Find the selling price of article R.
1
Rs. 560
2
Rs. 480
3
Rs. 490
4
Rs. 420
5
Rs. 540