During the summer vacation, Jiajia helped Uncle Li sell schoolbags. Uncle Li put 100 schoolbags in the warehouse, and the monthly rent was 2,000 yuan. These schoolbags were originally expected to be sold for two months. Due to the lower price, they were sold out in one month, which saved money. rent. After the settlement, I made an extra 500 yuan. How much is the price reduction for each schoolbag?
暑假里佳佳帮李大伯卖书包，李大伯在仓库放了100个书包，每月租金2000元，这些书包原来估计要销售2个月，由于降低了价格，结果一个月就销售完了，因此节省了租金．结算下来，反而多赚了500元，每个书包降价多少元？
<gadget id="calculator">2 - 1</gadget>
<output>1</output>

<gadget id="calculator">2_000 * 1</gadget>
<output>2_000</output>

<gadget id="calculator">2_000 - 500</gadget>
<output>1_500</output>

<gadget id="calculator">1_500 / 100</gadget>
<output>15</output>

<result>15</result>