It means the FOB price, or basically the price without shipping can run from $0.04 to $0.07. The 3 cent spread may have to do with quantity, options, whatever. When you see a listing like that FOB Price means plus shipping. As far as the 3 cent variation, you need to contact them.
A project manager is a professional in the field of project management. Project managers can have the responsibility of the planning, execution, and closing of any project, typically relating to construction industry, engineering, architecture, computing, and telecommunications.
Every project should include a communication management plan - a document that guides projects communications. This plan should be part of overall project plan. The type of communication will vary with the needs of the project. An effective Project Manager spends most of her/his time in Communication. According to the PMBOK guide, a Project Manager spends 70-90% of her/his time in communication during a project. Communication Management needs to be planned during the beginning of the project.