The color TV is sold at the original price, and each set makes a profit of 60 yuan; now that the price is reduced, the sales volume of color TVs is doubled, and the total profit obtained is increased by 0.5 times, so how much is the price of each color TV reduced?
彩电按原价格销售，每台获利60元；现在降价销售，结果彩电销售量增加一倍，获得的总利润增加了0.5倍，则每台彩电降价了多少
<gadget id="calculator">60 * 2</gadget>
<output>120</output>

<gadget id="calculator">60 * 1.5</gadget>
<output>90</output>

<gadget id="calculator">120 - 90</gadget>
<output>30</output>

<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<result>15</result>