题目

People who become m often learn how to play an instrument at an early age. 答案：【1】musicians华阳超市购进200枝钢笔，每枝钢笔的进价是8.5元．这些钢笔全部售出后，超市可获得的销售额是2040元． (1)平均每枝钢笔的售价是多少元？ (2)在进价的基础上，超市是加价百分之几售出这批钢笔的？