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 rent other place? Rm250 may do it
Car installment: RM 400 per month kapcai would cost less
Petrol + Parking: RM 150 per month park-what?
PTPTN: RM 150 per month
Parent: RM 200 per month
Phone Bill: RM 50 per month
Eat: RM 25 per day * 30 = RM 700
Insurance: RM 100 per month
Additional expenses (entertainment): RM 200 per month

Total: RM 2550 per month

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