It's a bit of an ambiguous question.
On the one hand they give you the QFE, so you immediately think that your altimeter will be reading 0 on the altimeter, which is correct!
But what it's actually wanting for an answer is the aerodrome altitude plus the differences etc. Now which one is correct?
I would say both.. but obviously only one can be correct. So I'm going to go with the addition method at the end, which is also bose-x's method.
Islander isn't wrong in what he's saying, it's just a very poorly written question. It's worth noting that if the QFE is higher than the standard setting of 1013, then a subtraction will be used at the end.