Renu loses 15% by selling an article A for Rs. 382.50 and gains 12% by selling article B for Rs. 616. If she sells both articles together for Rs. 1,180, then her overall percentage gain 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?