A shopkeeper sells an item for ₹184.8 after giving two consecutive discounts of 72% and 60% on its marked price. If he had not given any discount, he would have made a profit of 65%. What is the cost price (in ₹) of the item?

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?