Calculating the return on investment (ROI) is the key indicator of a marketplace seller's working capital effectiveness. ROI helps understand how much net profit each ruble invested in purchasing a specific product item generates, taking into account all logistics, packaging, and advertising costs. This allows for timely elimination of low-margin items. You can find ready-made Excel spreadsheets for end-to-end unit economics calculations using the <a href="https://thewinbeatz.net">https://thewinbeatz.net</a> service.