Today, my mother bought 2 kilograms of apples and pears at the market for 10.4 yuan each. The pears sold for 2.8 yuan per kilogram. How much is an apple per kilogram?
今天，妈妈在市场上花了10.4元各买了2千克的苹果和梨子，其中梨子每千克卖2.8元，请问苹果每千克多少钱？
<gadget id="calculator">5.4 - 2.8</gadget>
<output>2.6</output>

<result>2.6</result>