Xiaoyue bought 3 catties of fruit candy, 1 catty of peanut candy and 2 catties of milk candy in the mall. It is known that fruit candy is 8 yuan per catty, peanut candy is 7 yuan per catty, and milk candy is 10 yuan per catty. Question: How much is the candy Xiaoyue bought on average per catty?
小悦在商场买了3斤水果糖、1斤花生糖和2斤奶糖．已知水果糖每斤8元，花生糖每斤7元，奶糖每斤10元．问：小悦买的糖果平均每斤多少钱？
<gadget id="calculator">8 * 3</gadget>
<output>24</output>

<gadget id="calculator">7 * 1</gadget>
<output>7</output>

<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<gadget id="calculator">24 + 7 + 20</gadget>
<output>51</output>

<gadget id="calculator">3 + 1 + 2</gadget>
<output>6</output>

<gadget id="calculator">51 / 6</gadget>
<output>17/2 = around 8.5</output>

<result>17/2 = around 8.5</result>