Milk candy is 14 yuan per kilogram, fruit candy is 10 yuan per kilogram, and halva is 12 yuan per kilogram. Now mix 3 kg of toffee, 3 kg of fruit sugar and 4 kg of halva to make assorted candies. What is the unit price of assorted candies per kilogram?
奶糖每千克14元，水果糖每千克10元，酥糖每千克12元．现在把3千克奶糖、3千克水果糖和4千克酥糖混合成什锦糖，什锦糖单价是每千克多少元．
<gadget id="calculator">14 * 3</gadget>
<output>42</output>

<gadget id="calculator">10 * 3</gadget>
<output>30</output>

<gadget id="calculator">12 * 4</gadget>
<output>48</output>

<gadget id="calculator">42 + 30 + 48</gadget>
<output>120</output>

<gadget id="calculator">3 + 3 + 4</gadget>
<output>10</output>

<gadget id="calculator">120 / 10</gadget>
<output>12</output>

<result>12</result>