The profit calculation method for online stores generally includes three parts: product cost, operating cost and sales revenue.

First, you need to calculate the cost of each product, including procurement cost, logistics cost and storage cost.

Then, you need to determine the operating costs of the online store, including advertising costs, labor costs, water and electricity costs, etc.

Finally, substitute the product cost, operating cost and sales revenue into the profit calculation formula to get the profit of the online store. However, it should be noted that different types of online stores and industries may have different calculation methods and formulas.