I make that 7500 for a one-way.
I still have a grab of the old redemption tables so if I get a chance later today I'll see if I can put it up online somewhere.
OK I've now put up the old redemption tables. The *A version is
here and the other partners one
here.
You can use these to check what you would have been charged for a redemption if you want to check your refund. Or, you know, to reminisce about happier times.
Sorry the format is a bit scrappy - I only saved the HTML not the CSS but you should be able to read it OK.