Amazon's financial calculation of profit is divided into the following steps: First, Amazon will deduct direct costs from sales, that is, the cost of selling goods. These direct costs include procurement costs, transportation costs, warehousing costs, packaging costs, etc. Secondly, Amazon will deduct variable costs from sales, such as promotional costs, advertising costs, etc. These costs are incurred by sales, but they are not the cost of the goods themselves. Then, Amazon will deduct fixed costs, such as employee salaries, rent, office expenses, etc. These costs have nothing to do with sales, but are crucial to the operation of the company. Finally, the net profit calculated by Amazon is the profit after deducting all costs from sales. This value can help companies understand their profitability and formulate corresponding business strategies. I hope this answer can answer your question.