The prices of the three kinds of candies in the supermarket are: fruit candy is 10 yuan per kilogram, milk candy is 12 yuan per kilogram, and sandwich candy is 20 yuan per kilogram. Take the same quality of three types of sugar and mix them into assorted sugar for sale. How much is the price per kilogram of assorted sugar?
超市里三种糖果的售价分别是：水果糖每千克10元，奶糖每千克12元，夹心糖每千克20元．取同样质量的三种糖混合成什锦糖出售，每千克什锦糖的售价多少元？
<gadget id="calculator">10 + 12 + 20</gadget>
<output>42</output>

<gadget id="calculator">42 / 3</gadget>
<output>14</output>

<result>14</result>