How much did you actually spend per day on food and drinks? How much should I expect?

Hey! I’m planning a trip to Koh Samui, Koh Tao and Koh Phangan in July and trying to get a realistic idea of daily food + drink costs.

I’ve seen a lot of mixed info online, so I’d love to hear from people who have actually been there recently.
I was hoping to stick to about 750 baht per day is this realistic or not? Do you have any cheap recommendations?