June 2009 PTC unit 19 past paper

noodles
noodles Registered Posts: 308 Dedicated contributor 🦉
Help please
I am having trouble understanding how the figure £3000 is calculated in question 1.1 re the music system. I understand totally how you get to £2520 but then the answer adds back £480 and I am baffled as to why this is.
any explanations would be appreciated
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