A person sells two coats at the same time in a certain transaction, each of which is sold at 135 yuan. If the cost is calculated, one of them has a 25% profit and the other has a 25% loss. How can this person make a profit in this transaction? Lost or lost? How much did you make or lose?
某人在某一次买卖中同时卖出两件上衣，每件都以135元出售，若按成本算，其中一件盈利25%，另一件亏本25%，试问此次买卖中这个人是赚了还是赔了？赚了或赔了多少？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">135 / (3/4)</gadget>
<output>180</output>

<gadget id="calculator">180 * (1/4)</gadget>
<output>45</output>

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

<gadget id="calculator">135 / (5/4)</gadget>
<output>108</output>

<gadget id="calculator">108 * (1/4)</gadget>
<output>27</output>

<gadget id="calculator">45 - 27</gadget>
<output>18</output>

<result>18</result>