Businesses that sell through Amazon can use Customer Service by Amazon (CSBA) to handle their customer service. This 24-hour service, which customers can discuss orders via phone, instant message, and email, is being offered on a 30-day free trial basis. Thereafter, an CSBA fee is charged on each self-fulfilled shipped unit according to your customer service performance, which is measured by Contacts per Unit (CPU). #IdeaoftheDay