To make money in business, you have to

1. know precise numbers of your business. What your gross, operating, net profit is, cash flow, inventory turnover is.
2. know when and what inventory to send, when and how much inventory to order and so on.
3. improve efficiency as Amazon takes a big chunk from your net sales so that your ROI will increase.
4. track your performance to see where you are growing and where you are shrinking.

These are just some of the insights you get using Gorilla ROI and Gorilla Sheets.