In order to prepare gifts for Children's Day, a certain school sent Teacher Wang to Beijing Road to buy gifts. Mrs. Wang ordered 2008 Beijing Olympic mascots from a store selling gifts, and expected to order 160 pieces, with each mascot priced at 15 yuan. Teacher Wang said to the boss selling gifts: "If you are willing to reduce the price, I will order 40 more pieces for every 0.5 yuan reduction of each mascot." The boss calculated, if the price of each mascot is reduced by 10%, because Mr. Wang bought some more, and the total profit he could get was 180 yuan more than before. How much does this item cost?
某校为了准备"六一"儿童节礼物，派王老师到北京路购买礼物．王老师向卖礼品的商店订购2008年北京奥运吉祥物，预计订购160件，每一个吉祥物定价15元．王老师对卖礼品的老板说："如果你肯减价，每个吉祥物每减价0.5元，我就多订购40件．"老板算了一下，如果每个吉祥物减价10%，由于王老师多买了一些，可获得的总利润比原来还多180元．问这种商品的成本是多少？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">15 * (9/10)</gadget>
<output>27/2 = around 13.5</output>

<gadget id="calculator">(1/10) / 0.5</gadget>
<output>0.2</output>

<gadget id="calculator">15 * 0.2</gadget>
<output>3</output>

<gadget id="calculator">40 * 3</gadget>
<output>120</output>

<gadget id="calculator">160 + 120</gadget>
<output>280</output>

<gadget id="calculator">(27/2) * 280</gadget>
<output>3_780</output>

<gadget id="calculator">160 * 15</gadget>
<output>2_400</output>

<gadget id="calculator">3_780 - 2_400 - 180</gadget>
<output>1_200</output>

<gadget id="calculator">1_200 / 120</gadget>
<output>10</output>

<result>10</result>