I feel so Stressed! I want to enjoy good life but I don't want to give my parents $500 per month

I worked for few years now and I am so stressed at work and after work. Its always about money money and money. My parents demand money from me every month. I feel they are taking adventage of me. Every month they will constantly demand $500 from me. I explaines to them that ny salary is only so little, after deducting my daily expenses: 1-transport to work and home $30 2-lunch and dinne4 $30 3-misc $20 Those alone work out to at least

but why does mobile so expensive? u do big business (co. will pay anyway) ? or need to contact an interest group? trpt is most ridiculous , good to cut by more than 120%! while we should entertain friends at time, your dinner are already include the daily meal too, that entertainment has room for cut too u don't do laundry at home? of cos u have to feed ur parents, if u don't even laundry, they learnt from u to laundry separately too, S$500 is nothing I agree with some