A clothing store sells a piece of clothing with a 20% increase in the purchase price. When 60% of this batch of clothing and 50 pieces are sold, in addition to recovering the cost, a profit of 2% of the cost is also obtained. How many pieces of this clothing are there in total?
服装商场销售一款服装，按进货价加价20%出售，当售出这批服装的60%又50件，除收回成本外，还获得成本的2%利润，这款服装一共多少件？
<gadget id="calculator">0.02 - 0.72</gadget>
<output>-0.7</output>

<gadget id="calculator">1 + (-0.7)</gadget>
<output>0.3</output>

<gadget id="calculator">60 / 0.3</gadget>
<output>200</output>

<result>200</result>