Have you tried roasted a chicken? A whole chicken costs $6. Feeds 2 with leftovers, the bones can be used for broth, which can make lots of things, especially soup. The leftover meat is great for many things, like fried with potatoes. Sometimes I find that the chicken was used for 10 meals. Of course other things are added along the way, but veggies are dirt cheap.
That means you blew your 3-day food budget on half a chicken. That's just not nearly enough calories for 3 days. I'm not doubting you're able to afford chicken on that tight budget, it just seems that you're using it more like a condiment, rather than food.
I think many people take for granted that we can live so well here, and buy whatever looks good, and not planning ahead of time. But honestly it's fun to make meals yourself while saving money, and you can avoid some of the weird stuff they put in a lot of preprocessed foods. I admit we are trying to live frugally, we're trying to kill a house mortgage.
That's the nice thing about global markets: OP just needs a thousand customers a month = $30k/month gross. Maybe half that goes to shipping. If you can get each of those products for $1-$2 each in bulk, you're doing okay.
Some product might be free, highly-subsidized or he gets paid because the manufacturer wants to build an overseas market.
IMO if that’s what you’re spending on food, most sane advertisers would exclude you as well.