OP you said you JUST moved out ,meaning you’re building a life for yourself.
That should be your first priority.
When my big sis graduated and got her own , my parents were on the same wave asking for $500 every time she got paid ,etc and eventually she told them she couldn’t keep giving them money. And you know what happened? They stopped asking and figured it out themselves.
You need to do the same- focus on building a life for yourself first and if there’s any left to occasionally help , then give them if you want. But don’t give it to them every time they ask or don’t give them all of the amount.
You’re creating a codependent dynamic where your parents don’t have to figure out the solution to their $700 problem because you’re doing it for them .
When you become more established, then you can consider helping them on a more consistent basis ,if you choose.