投资回报率（ROI）计算器
此计算器可帮助您评估一项投资的盈利能力。ROI 是一项财务指标，用于将投资的收益或损失与投资成本进行比较。它以百分比表示。
LTV : CAC
1 : 1 or less
The business is working at a loss, you need to make
changes as soon as possible.
2 : 1
Customers bring two times more money than it costs to
acquire them.
3 : 1
This is the optimal ratio to hit. It means the business
model is profitable.
4 : 1
The business is very lucrative: acquiring customers is
cheap, and they bring great value to the company.