Thanks for the comments.
I took 2 years to pay my school fees.

My sibling is still schooling but she does not take allowance from my parents. I didnt take allowance from my parents while in uni too.

I did find out how much expenses my parents need per month. It amounts up to about 1k including house loans, utilities and groceries. So because they're not working, does that mean I should target to give 1k?

They did ask for 1k when i first started work but i said its not possible because of the school fees. So i think thats the ideal amount they're after. Just can't gauge because i do think 700 is quite high among my peers but it does vary from family to family..