I spent only $2 a day on food for a month -- here are the 9 foods I bought to get the most for my money

Tips to Save Money on Food That Help You and Your Wallet

If you're spending $2 a day on food, you have to shop strategically.

I did just that for the month of January on the "Elon Musk Challenge," spending a little under $62 on food over the course of the 31-day month.

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I did all of my shopping at the famously affordable Trader Joe's. Yes, I've heard that Aldi is cheaper, and I probably could have found better deals at an ethnic market -- but Trader Joe's is conveniently located in my neighborhood and I know the lay of the land.

I only purchased nine items during the month-long challenge, which I ate repeatedly. I'm sure there are plenty of other cheap products out there, but these were my staples:

Oats

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Cost: $3.99

Cost per serving: $0.20

Bananas

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Cost: $0.19

Cost per serving: $0.19

Peanut Butter

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Cost: $2.49

Cost per serving: $0.18

Tortilla

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Cost: $1.49

Cost per serving (2 tortillas): $0.25

Sunflower seeds

Kathleen Elkins/Business Insider

Cost: $1.99

Cost per serving: $0.14

Pasta

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Cost: $0.99

Cost per serving: $0.12

Butter

Kathleen Elkins/Business Insider

Cost: $2.99

Cost per serving: $0.10

Sweet potatoes

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Cost: $0.49

Cost per serving: $0.49

Eggs

Kathleen Elkins/Business Insider

Cost: $2.79

Cost per egg: $0.23

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