Xiao Ming sold two stamp albums, each for 600 yuan. The first book was sold for 20% less than the original price, and the second book was sold for 20% more than the original price. Please use the knowledge you have learned to calculate, did Xiao Ming lose or win?
小明卖了两本集邮册，每本卖得600元，第一本少卖了原价的20%，第二本多卖了原价的20%．请运用所学的知识算一算，小明是赔了还是赚了？
<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">600 / (6/5)</gadget>
<output>500</output>

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

<gadget id="calculator">600 / (4/5)</gadget>
<output>750</output>

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

<gadget id="calculator">600 * 2</gadget>
<output>1_200</output>

<gadget id="calculator">1_250 - 1_200</gadget>
<output>50</output>

<result>50</result>