You could eat three eggs ~150g for ~20g protein, ~200 cals and it would cost you about a dollar if you buy by the dozen. Going by UK prices, we pay &lt;£3 for a dozen large eggs so 75 pence for 3.<p>If you fried them up as an omelette, you get a healthy breakfast with very few carbs. Chuck in a tablespoon of olive oil (again, we assume bought by the litre) and you&#x27;ve got another 100 calories.<p>Fruit is expensive because, per your locale, it&#x27;s almost always out of season. Supermarket apples in particular are massively marked up; we pay £2 a bag here. Any orchard will sell you apples (seasonally) for much much less.