University exchange student in Selangor,,How much do i need?

Hi, i'm going to be an exchange student in a university in Selangor(subang jaya) for a month.
So i'd like to know how much do i need for a living there ? ,,like average cost for a meal, coffee, etc.
and how much do i need for sightseeing at Genting highland?
and which phone operator shld i use if i more focused on Data ?

Thx in advance !! :)

Are you still in Malaysia?