Price to paint sash windows

Hi guys.

I hope you don't mind me asking, but I was wondering what sort of prices people charge to make good old exterior wooden sash windows (prime, u/c, gloss, putty, fill, etc).

I've been asked to quote for 7 windows and a door in here in sunny old Kent.

6 of the windows are on the first floor, two of them with the general public walking by as we'll be on a high street. We'll need to use a tower scaffold for this of course.

Any thoughts?

Thanks