If a store sells two items at the same time, and each item earns 30 yuan, one earns 20% and the other loses 20%, what is the loss of the store selling these two items?
某商店同时卖出两件商品，每件各得30元，其中一件赚了20%，另一件亏本20%，则这个商店卖出这两件商品亏本多少元
<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>