"We are always looking at ways to avoid increasing our prices such as by working with different sugar manufacturers," Hartwig says. "But a lot of our suppliers we have known for years and they've become friends, so it gets tough.
Using some algebraic manipulation, it’s easy to show this is equivalent
，这一点在快连下载安装中也有详细论述
但后来为了提升毛利、摆脱低端形象，完美日记后期多次尝试高端化：推出更高价位的产品线、强调科技成分、包装升级、与高端 IP 联名……但每一次尝试都结果平平。
这篇文章，我帮你把这件事彻底讲清楚。