Ye ok sounds like you did a lot in 14 man hours, depends how bad the clean was of course. Sounds more like £300 now!! Perhaps more if they did not know how long it took but am always mindful that anyone watching might question £20 plus per hour -per cleaning operative. Some window cleaning can pay £30 per hour but I take care not to discuss this with customers. Just my opinion- I personally am happy with £130 per day for one man as I'm in this long term and hope to always keep customers. There is a massive difference in the South and North with prices for most jobs however it does depend on the type of work.