When an article is sold for Rs. 115, the profit is twice as much as the profit earned when it is sold for Rs. 95. The cost price of the article is:

A company considers hiring an extra machine for $150 per day to produce additional units. If the additional throughput contribution generated from producing these units on the machine is $390, by how much will total profit increase?

If the cost price of an article is 85 times its selling price, what is the loss percentage?