The fruit shop bought a batch of apples from other places at a price of 9.6 yuan per kilogram. After selection, the apples were divided into first-class, second-class apples, and first- and second-class apples. The mass ratio of apples was 5:3. The price is 8.4 yuan per kilogram. Manager Xu wants to get 25% of the profit. How much should the first-class apple be sold per kilogram?
水果店以每千克9.6元的价格从外地购进一批苹果，经过挑选，把这批苹果分成了一、二两等、一、二两等苹果的质量比是5：3，二等苹果以每千克8.4元的价格出售，徐经理想要获得25%的利润，一等苹果每千克应卖多少元？
<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">9.6 * 8 * (5/4)</gadget>
<output>96</output>

<gadget id="calculator">8.4 * 3</gadget>
<output>25.2</output>

<gadget id="calculator">96 - 25.2</gadget>
<output>70.8</output>

<gadget id="calculator">70.8 / 5</gadget>
<output>14.16</output>

<result>14.16</result>