Doubt - Please help

intermediate(ipc)course (no) (1460 Points)

21 September 2011  

Rosa paid 1200 on 1-7-09 towards yearly subscriptttion(july1,2009 to june30,2010) of a newspaper.it means she has to make adjustment of ----------------- expenses for finalisation of a/c for the year ended 31-3-10.

ans is300 as prepaid.

my question is how this is prepaid of 300.please explain this.