for economics part read economics for b.com part I and part II only, relevant chapters. Adil saeed safi's books of micro and macro economics books are very easy to read.It will cover public finance even
for management read principles of management i forgot author's name we read it in bba 1st semester, only theories.
and and GAT general book for maths and vocab section.
i request all senior members to suggest book or material for function of national savings organizations and economic development.

Regards