The costs of Amazon self-delivery include the following aspects:

1. Shipping costs: Amazon self-delivery costs are calculated based on the weight and distance of the package, which is usually lower than FBA costs.

2. Packaging material costs: Amazon self-delivery requires the use of packaging materials, such as boxes, tape, etc., and the costs of these materials also need to be included in the cost.

3. Operating costs: Amazon self-delivery requires inventory management, order processing and other operational activities, and the costs of these activities also need to be taken into account.

4. Taxes: Amazon self-delivery requires the payment of relevant taxes and fees, such as import taxes, value-added tax, etc., and these fees also need to be calculated.

In general, the cost of Amazon self-delivery is relatively low, but the costs of the above aspects need to be taken into account, and reasonable planning and management are required to ensure that the cost is within a controllable range.