GRE数学某题

题目

GRE数学某题
the selling price of B is 80 which include a markup that was 25 percent of the cost of B这句话不会
全部题目为：The store sells two kinds of bags A and B,the selling price of A is 60 and the cost is 45,the selling price of B is 80 which include a markup that was 25 percent of the cost of B.What is the profit for selling 100 A bags and 50 bags?
只想请教一下那一句话的意思,

答案

markup意思是加价,可以理解为利润,它的百分比是以成本做基础的.
the selling price of B is 80 which include a markup that was 25 percent of the cost of B：
B的售价是80,其中包括占成本25%的利润值.
故（1+25%）* cost of B = 80
B的成本是64.