The loss incurred by selling an article for Rs. 11,596 is equal to the profit earned when the same article is sold for Rs. 16,040. What should be the selling price to make a 50% profit?

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?