Fixed costs as a % of total production cost

Hi,
I am looking at a specimen paper (Kaplan exam kit) and the question includes

General fixed overheads at 10% of total production cost – $1211

In general I understand fixed overheads are not relevant as they are not incremental, but in this case, it is incremental because as production increases, so does fixed overhead cost? Or are we saying it is $1211, which incidentally is 10%. If anything changes, it will remain at $1211 but maybe not at 10%.

Thanks!