Hi just after a bit of advice regarding how much to charge. I have been asked to install 4 down lighters and two sockets in a garage that is having half of it converted into a usable space. There is already an rcd protected dis board in the garage and already has a socket outlet and lighting. The plasterer is coming at the end of the week so it is blank canvass. I am a fully qualified spark, its just I work for a contracting firm and have no idea regarding pricing. Help on this issue would be greatly appreciated.