The most standard way to calculate Amazon's profit is profit before tax (PBT). It is calculated by subtracting costs, interest, and taxes from total revenue.

Total revenue includes revenue from the sale of products or services and other sources of income.

Costs include direct costs (such as materials and labor) and indirect costs (such as management and marketing expenses).

Interest refers to the fees a company pays for borrowed money, and taxes refer to the fees a company pays to the government.