The calculation of Amazon's monthly profit includes the following steps:

Calculate sales and sales costs: First, you need to count the sales and sales costs of each month, including product costs, transportation costs, Amazon platform fees, etc.

Calculate gross profit: Gross profit refers to the profit of sales minus sales costs. The calculation formula for gross profit is: Gross profit = sales - product costs - transportation costs - Amazon platform fees.

Calculate net profit: Net profit refers to the profit of gross profit minus various taxes and other fees. Taxes and other fees that need to be deducted may include corporate income tax, value-added tax, advertising costs, labor costs, etc.

Consider tax issues: If you are a company registered in China, you need to conduct cross-border e-commerce sales on the Amazon platform, and you need to pay corporate income tax and value-added tax according to the actual situation. The specific tax calculation method and tax rate need to be determined according to local policies and regulations.

Count other expenses: In addition to sales costs and taxes, you also need to consider other possible expenses, such as office expenses, travel expenses, etc.

Calculate monthly profit: Finally, after deducting all expenses, you can calculate the monthly profit. The calculation formula is: Monthly profit = gross profit - various taxes and other fees.

It should be noted that the fees and policies of the Amazon platform may be constantly adjusted and changed, so you need to pay attention to the platform dynamics at any time and adjust the accounting method in time. In addition, if it involves cross-border trade, you also need to consider the impact of exchange rate fluctuations on profits.