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.
Remember that a project management plan is there simply to help you, the project manager get the project delivered and highlight any problems, or work you've missed. It is not there to be long, complicated and difficult to understand.