Might just get the wife involved or find myself a bucket and vac monkey to help with this

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1/ I am flexible in my working hours, and will fit in the cleaning to suit your opening hours.
2/ Cut off point would be 6 am so carpet would be dry for opening at 8am. (I use high-powered drying fans, to speed up drying time)
3/ 21850 square feet, dimensions supplied by you, at 0.28p per square foot. Total comes in at £6118.00. There is no vat on top of that.
4/Some of the carpeted areas are extremely dirty, which would normally increase the price to .32p per square foot, but you mentioned that some of the displays are immovable so that would compensate. Meaning no extra charge.
5/ I would highly recommend that you have an annual contract and would therefore suggest adding you to my list of yearly commercial jobs. If this is acceptable I would be prepared to halve the above price to £3059.00, for a written contract for my services on an annual basis yearly basis until 2011. There would be no increase on these prices during the contract period.
6/ The job will involve a through vacuum, followed by a high alkali pre spray, which is then worked into the carpet using a contra rotating machine, this will then be followed by steam extraction. Drying using large fans.
7/ I estimate the job will take 2 of us 30 hours to complete, so I could do 3 sessions starting at 6pm end at 4am, or 6 sessions, start at 6pm end at 11pm. But as previously stated, I am happy to work around you and your staff.
You mentioned that you have had the carpets cleaned before, was it an increase in price, or the quality of the other companies work that has made you look elsewhere?