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 most appropriate option.
A) 28%
B) 32%
C) 35%
D) 45%
E) 52%
Let the price of the product be $100 and let original sale be 100 pieces   Then , Total Revenue = 100*100= 
<gadget id="calculator">100*100</gadget>
<output>10_000</output>
$10000   New revenue= 80*160= 
<gadget id="calculator">80*160</gadget>
<output>12_800</output>
$ 12800   Increase in revenue= 2800*100/10000= 
<gadget id="calculator">2800*100/10000</gadget>
<output>28</output>
28%   28%nswer is 28%
<result>A</result>
When the price of a product was decreased by 20%, the number sold increased by 60%. What was the effect on the total revenue ?