Three successive discounts of 4%, 5%, and 10% are given on a book. If the customer gets a total discount of Rs. 448.20, then what is the marked price of the book?

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?