When the price of a product was decreased by 20%, the number sold increased by 60%. What was the effect on the total revenue ?
Choose the correct choice from the following.
A) 28 %	B) 32 %	C) 35 %	D) 45 %	E) 52 %

Rationale: let the price of the product be $ 100 and let original sale be 100 pieces then , total revenue = 100 * 100 = $ 10000 new revenue = 80 * 160 = $ 12800 increase in revenue = 2800 * 100 / 10000 = 28 % answer is a
Answer: A