The shopping mall sold two items at a price of 500 yuan each. Compared with the purchase price, one item made a profit (3/5) and the other item lost (3/5). The boss said: "Sell these two items. There is no profit or loss on this product." Do you think the boss is right? Please explain why.
商场以每件500元的价格出售了两件商品，都与进价相比较，一件商品赚了(3/5)，一件商品亏损了(3/5)，老板说："出售这两件商品不赚不亏．"你认为老板说的对吗？请说明理由．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">500 / (2/5)</gadget>
<output>1_250</output>

<gadget id="calculator">1_250 - 500</gadget>
<output>750</output>

<gadget id="calculator">1 + (3/5)</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">500 / (8/5)</gadget>
<output>625/2 = around 312.5</output>

<gadget id="calculator">500 - (625/2)</gadget>
<output>375/2 = around 187.5</output>

<gadget id="calculator">750 - (375/2)</gadget>
<output>1_125/2 = around 562.5</output>

<result>1_125/2 = around 562.5</result>