Once you have defined your goals, you need to choose a formula that can help you calculate your ROI. There are different ways to measure ROI, depending on how you define your investment and your return. For example, you can use the simple ROI formula, which is:
ROI = (Return - Investment) / Investment
In this formula, you subtract your investment from your return and divide it by your investment. The result is a percentage that shows how much you gained or lost from your investment. For example, if you invested $10,000 in your computer repair business and earned $15,000 in return, your ROI would be:
ROI = ($15,000 - $10,000) / $10,000
This means that you earned 50% more than what you invested.
However, this formula may not capture all the aspects of your computer repair business. For example, it does not account for the time value of money, the opportunity cost of your investment, or the risk involved in your business. Therefore, you may want to use more advanced formulas, such as the net present value (NPV), the internal rate of return (IRR), or the payback period (PP). These formulas can help you compare different investment scenarios and evaluate the profitability and feasibility of your computer repair business.