I am accessing this based on a fresh grad who work in klang valley.
I think i have make a fair expenses review here.

Room Rental (include elec, water, internet): RM 600 per month/(350)
Car installment: RM 400 per month(no car/ kap chai)
Petrol + Parking: RM 150 per month(motor max rm 50)
PTPTN: RM 150 per month(no ptptn)
Parent: RM 200 per month(no)
Phone Bill: RM 50 per month(30 max)
Eat: RM 25 per day * 30 = RM 700(acceptable)
Insurance: RM 100 per month(no)
Additional expenses (entertainment): RM 200 per month(100)

Total: RM 2550 per month

So those who no earn RM 3k per month how u survive? Mind share