The profit earned on selling an article for Rs. 4,550 is 5 times the loss incurred on selling the same article for Rs. 3,290. What will be the selling price of the article to earn a profit of 20%?

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?