Our car was in for its 24k service yesterday, it was going to cost me £80 for a oil change and new oil filter, air filter and new plugs, which was OK I thought.But while up on the ramp, they noticed that one of the front Boot Covers had lost it's clip, so they cleaned out the joint, and regressed it, and put on a new clip, all that came to another £20 including vat, but could have cost a lot more if it wasn't spotted.Was that an average cost do you think?