Xinxin Supermarket priced a set of children's clothing at a price increase of 100% of the purchase price, then wrote "reward" and sold it at a 20% discount. As a result, this set of children's clothing still made a profit of 60 yuan. How much is the purchase price of this set of children's clothing?
欣欣超市将一套童装按进价的100%加价后定价，然后写上"酬宾"，再打八折出售，结果这套童装仍获利60元，这套童装的进价是多少元？
<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">1 + 1</gadget>
<output>2</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2 * (4/5)</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">(8/5) - 1</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">60 / (3/5)</gadget>
<output>100</output>

<result>100</result>