Study the following information carefully and answers the questions given below.

The sum of the cost price of all the items is Rs. 25,410. If the cost price of the item is more than Rs. 4500 then the marked price of the item is 40% higher and if the cost price of the item is less than Rs. 4500 then the marked price of the item is 25% higher. And if the marked price of the item is more than Rs. 7250 then the discount given on the item is 20% and if the marked price of the item is less than Rs. 7250 then the discount given on the item is 10%.

The Line graph given below shows the cost price of five different items P, Q, R, S and T.