A store sells two products at the same time, and each gets 30 yuan, one of which makes a 20% profit and the other a 20% loss. Is the store making a profit or a loss on the whole selling these two items? How much is it?
某商店同时卖出两件商品，每件各得30元，其中一件盈利20%，另一件亏本20%．这个商店卖出这两件商品总体上是盈利还是亏本？具体是多少？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">30 / (6/5)</gadget>
<output>25</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">30 / (4/5)</gadget>
<output>75/2 = around 37.5</output>

<gadget id="calculator">30 + 30</gadget>
<output>60</output>

<gadget id="calculator">(75/2) - 60</gadget>
<output>-45/2 = around -22.5</output>

<gadget id="calculator">25 + (-45/2)</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>