When a shopkeeper sells item A for Rs. 384, there is a loss of 20%, and when he sells item B for Rs. 400, there is a profit of 25%. What is the profit/loss percent if he sells both items for a total of Rs. 852?

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?