Advice needed

I'm about to take some important exams, which will decide whether I get quite a substantial pay rise, and have a number of things I'm looking at buying to treat myself if I pass.

They are:
1. Perfume
2. A new work outfit
3. These really pretty shoes at Faith, should be £52 currently on offer with 20% off at £48 (which by the way is on lots of shoes at the moment but conveniently doesn't say when it's on til)

So, ladies and gents, here's my question for you: