阅读理解 Dear Lucy, Thank you for your last e-mail. You told me about your best friend. Now let me tell you about my best friend, Jane. Jane is as old as me, but she is a little shorter .She has brown hair and blue eyes. She is always happy. We are in the same class, and we often help each other with our schoolwork. I think she is smarter than me .We both enjoy playing ping-pong, and we practice together every day. We play computer games at times. Jane usually wins, However, she’s not as hard-working as me, and so I always get better grade百货商店服装专柜在销售中发现:某商品的进价为每件40元.当售价为每件60元时,每星期可卖出300件,现需降价处理,且经市场调查:每降价1元,每星期可多卖出20件.为占有市场份额,在确保盈利的前提下.(1)降价多少元时,每星期盈利为6125元.(2)降价多少元时,每星期盈利额最大,最大盈利额是多少?