The operating cost of Amazon depends on many factors, such as the type of goods you sell, sales volume, target market and so on. Here are some possible costs:

Subscription fee: Amazon needs to pay a subscription fee to become a seller. Amazon has two main subscription plans, monthly subscription and annual subscription, which cost $39.99 and $99 respectively. Monthly subscription is suitable for businesses with small sales, and annual subscription is suitable for businesses with large sales.

Platform fee: Amazon will also charge a platform fee according to the sales of the goods sold by the seller. The rate of platform fees varies according to the seller's sales volume and the types of goods sold.

Logistics costs: If you use Amazon logistics services, you need to pay warehousing and distribution costs. These expenses are calculated according to the size, weight and storage time of the goods.

Product cost: As a seller, you need to buy goods to sell. You need to calculate the purchase cost, transportation cost and any other expenses, such as labels and packaging materials.

In addition to the above fees, Amazon operations may also need to pay other expenses such as advertising fees, coupon fees, refund and return fees. Generally speaking, Amazon's operating costs vary according to the types of goods sold by sellers and their sales strategies.