Sorry to be late in answering your request, let me know if you need any help in pricing or look in members offers there is a supplier offer on pricing.
Put simply there are 4 areas which make up your price:
1. labour and associated costs
2. Equipment (including asset depreciation / rental ect)
3. Materials ( includes consumables)
4. Profit - How much money you will make at the end of the job. Don't forget to account for your overheads in the formula, insurance, training, office ect
You will need to factor Tax into your calculations, corporation, PAYE, VAT, CIS ect
Most commercial cleaners use a pricing formula, accounting for the above, you should be able to create your own price formula if you know your charges.
Hope you got your price sorted for this job
Kind regards
Geoff