How much should I expect to pay to have a pair of new rear discs fitted?

[Sami]

Ok I've got the discs but I don't have the tools here to fit them myself and I can't drive home cause one of the discs is cracked (twice!) so how much should I expect to pay to have a pair of rear discs fitted?

 

[Lunner]

1-2 hours tops, so £40-£80