There is a commodity whose purchase price in store A is 20% higher than that in store B. The profit margin of store A is 10% smaller than that of store B. The selling price of Store A is 16% higher than that of Store B. What is Store B's profit margin?
有一种商品，甲店进货价比乙店进货价高20%．甲店的利润率比乙店小10%．甲店的售价还比乙店的售价高16%．乙店的利润率是多少？
<result>2</result>