OK. You have to provide a full band for a midday starting fair on a Sunday. The venue is a private road in the city of London, an exclusive very wealthy area. Parking is limited in the vincinity, and if you're not lucky, it can be a mile walk (with a tuba in my case. And in its case.) You play two pieces at a time, in 6 or 7 slots over the length of the fair. You do not leave until 5 pm. You are a third or fourth section band. You routinely play well, but the timetable being so fractured, retuning is needed each time. This means that there is little scope for leaving the venue to (say) get a sherbert. The music you play is naff, typical Sunday "job" stuff, and overall the job is not at all satisfying from the players' point of view, even if the "audience" like it. There are no redeeming features to this job, except that it will bring in funds for an important event later in the year. So..... Five hours out on a Sunday - (perhaps ignoring the important event later in the year) how much do you charge?