clothing store bought a set of clothes and sold them at a price of 50% of the profit. It was not sold in the first week, but it was sold at 20% off the price in the second week. It was sold at a price of 720 yuan. What is the purchase price of the suit? ?
服装店进了一套衣服，按50%的盈利标价出售，第一周没有售出，第二周按标价的八折出售，以720元的价格售出，这套衣服的进价是多少元？
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

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

<gadget id="calculator">(3/2) * (4/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">720 / (6/5)</gadget>
<output>600</output>

<result>600</result>