A clothing store buys a batch of clothes and sells them. If the price is based on a 20% profit, each piece is exactly 120 yuan. What is the purchase price of each piece of this batch of clothes?
某服装店购进一批服装销售，如果按20%的利润定价，每件正好是120元，这批服装每件的进价是多少元？
<result>120</result>