心相印湿厕纸3.324八十抽+心相印卷纸0.658一卷，需要出掉家政
湿厕纸拍3送1家政，需要凑200-20，买下来29.62*3-9（返卡）-30（家政）=49.86/15=3.324一包卷纸拍3送1家政，29.74*3=89.22-30（家政）=59.22/90=0.658
https://img1.doubanio.com/view/group_topic/m/public/p670591560.webp
https://img1.doubanio.com/view/group_topic/m/public/p670591559.webp
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