The difference between the selling prices of an article sold at a discount of 14(1/2)% and 10(1/2)% is ₹48. If the marked price is 25% more than the cost price, then the cost price of the article 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?