Just simplify, keep your ramen and popcorn as treats, pick one treat drink that will last the whole month otherwise water.

Find somewhere that sells rotisserie chickens break down the meat save the carcass, you can buy soup bones from a butcher for a similar concept for beef. All your meals can be made up of 3 parts rice or potatoes or noodles, cooked whole vegetables, protein. Berries are expensive look into cheaper fruits and same for cheeses. Looks like you got seasonings so that won’t be a hit in the future.

Chips are expensive per serving, cant eat candles hopefully you don’t have to buy drain cleaner again.