fees. We evaluate whether it is appropriate to record the gross amount of product
sales and related costs or the net amount earned as commissions. Generally,
when we are primarily obligated in a transaction, are subject to inventory risk,
Product sales represent revenue from the sale of products and related shipping
fees and digital media content where we record revenue gross. Product sales
and shipping revenues, net of promotional discounts, rebates, and return
allowances, are recorded when the products are shipped and title passes to
customers. Retail sales to customers are made pursuant to a sales contract that
Service sales represent third-party seller fees earned (including commissions)
and related shipping fees, AWS sales, certain digital content subscriptions,
Return allowances, which reduce revenue and cost of sales, are estimated using
consumption taxes. Additionally, we periodically provide incentive offers to our
customers to encourage purchases. Such offers include current discount offers,
such as percentage discounts off current purchases, inducement offers, such as
offers for future discounts subject to a minimum current purchase, and other