An oil refinery buys oil at Rs 3600 per barrel. There is 10 % wastage. If the refinery wants to earn 5% profit then at what price should it sell including 8 % tax on selling price? (in Rs per barrel) 

A house and a shop were sold for Rs. 1 lakh each, In this transaction, the house sale resulted into 20 % loss whereas the shop sale into 20 % profit. The entire transaction resulted in:

A person bought two watches for Rs. 480. He sold one at a loss of 15% and the other at a profit of 19% and he found that each watch was sold at the same price. Find the cost price of the two watches.

Sarita sells a Phone at a profit of 20%. If she had bought it at 20% less and sold it for Rs. 180 less, she would have gained 25%. Find the cost price of the Phone.