Barathan offers his customers a discount of Rs. 50 on each shirt and still makes a profit of Rs. 100 per shirt. What is the actual cost price of the shirt that is marked @ Rs. 800?

Mani buys a gift article for Rs. 1500. He wants to sell it at a profit of Rs. 150 on sales and he marks @ Rs.1800. What is the discount that he will give to his customers?

Prepare a bill for the following books of biographies purchased from Maruthu Book Store, Chidambaram on 12.04.2018 bearing the bill number 507. 10 copies of Subramanya Bharathiar @ Rs. 55 each, 15 copies of Thiruvalluvar @ Rs. 75 each, 12 copies of Veeramamunivar @ Rs. 60 each and 12 copies of Thiru.Vi.Ka @ Rs. 70 each.

Fill up the appropriate boxes in the following table.

Sl. No	C.P. in Rs	M.P. in Rs	S.P. in Rs	Discount in Rs	Profit in Rs	Loss in Rs
(i)	110	130		Nil
(ii)	110	130		10
(iii)	110	130		30
(iv)	110	120			Nil	10
(v)		120		10	20	Nil

Somu bought a second hand bike for Rs. 28,000 and spent Rs. 2,000 on its repair. He sold it for Rs. 30,000. Find his profit or loss.