When a certain shoe store reduces the price of its best-selling style of shoe by 20 percent, the weekly sales of this style increase by 10 percent. Which of the following best describes the resulting change in the store's weekly revenue from sales of this style of shoe? Choose the correct choice from the following options:
A) Revenue decreases by 10%  B) Revenue decreases by 12%  C) There is no change in revenue  D) Revenue increases by 12%  E) Revenue increases by 10%
Old price = 10, old sales = 10 --&gt; old revenue = 100;   New price = 8, new sales = 11 --&gt; new revenue = 88.   Revenue decreased by 12%.   Answer: Revenue decreases by 12%.
<result>B</result>
When a certain shoe store reduces the price of its best-selling style of shoe by 20 percent, the weekly sales of this style increase by 10 percent. Which of the following best describes the resulting change in the store's weekly revenue from sales of this style of shoe?