12 pages of optimised website content required

Num. of words: 400 to 500 per page
Information for the blog/website: See extra notes below
Tone: Neutral
Outline & Structure: The content needs to be optimised for SEO purposes (one keyword per page). Keyword variants are to be used in page title and paragraph headings.
Extra notes: The requirement is for 12 pages of website content, written in UK English. The content must be 100% unique in the eyes of Google.

The subject matter is quite diverse - 6 pages for a local painter and decorator website, 3 pages for an ecommerce site selling accounting software and 3 pages for a counselling publications website.

We need 400 to 500 words per page and the pages also need to be keyword optimised (we will supply the keywords).

This work needs to be done asap (ideally within a week) and we are looking for fixed price proposals.