Anish purchased a camera and spent Rs. 600 for its servicing, then sold it to Bhavna at a 20% profit. Bhavna sold it to Chitra for Rs. 5400 and incurred a 10% loss. At what price did Anish purchase that camera?

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?