Amazon.com Inc. said Tuesday that it will spend $450 million over the next 12 months to fund rate increases to its roughly 3,500 worldwide parcel-delivery service providers, as well as to help providers defray the costs of matching their employees' contributions to a newly created 401(k) retirement program. In addition, Seattle-based Amazon (NASDAQ: AMZN) said it would spend up to $5,250 per year on a new program, called Next Mile, that will offer drivers who are employed by its service providers access to more than 1,700 academic programs.