Ramens were my example because they're extremely cheap. At 2 meals a day, you can go for 1.50$ (75cents for the big bowl of ramen +water, but well), and I'm not even sure that's the cheapest (though it's probably here).
While the concept is interesting, it's not really because of his price (but that helps).
And... yeah, I'd be wondering where you're at, or if you're using the fancier ramen. Ramen here's about a dime for a pack of the cheap stuff (bit more nowadays, but it's still like $0.12 USD, and a pack is two servings) if you buy it alone and less if you get it in bulk. Water... again, cut out that dime and 60 cent is about 3/4ths of a
gallon of water (which runs upper 70s to lower 90s for a gallon of bottled stuff. Tap's cheaper. Looking at about five cent a cup, or another dime added onto the ramen.), which would be enough water for about six packs of ramen if I'm running the numbers right (16 cups/gallon, 2 cups/ramen, 3/4th 8 = 6). 75 cent counting just water and ramen would be something like a 350% increase from what's normal where I'm at. Cooking portion eats up a bit more (though looking into it, not exactly much*). 75 cent would be more in line if you're throwing more stuff in there or using the more expensive stuff, but just ramen and water is considerably less, at least where I'm at.
Maybe if you added in transportation cost, but it's pretty easy to mitigate that into what amounts to nonexistence with non-perishables. Just get a year or so's worth of ramen in one go, or an amount equal to however much the particular foodstuff you're after can stand being stored.
How much do various cooking methods cost?
This table shows the difference in cost between various oven cooking methods. Notice that some types require less time to achieve a similar result; so the convection oven is 25% faster than other regular ovens. The costs shown ought to be what it takes to cook the same food in each.
Temperature
(degrees F) Time Energy Used Cost per unit Cost
Toaster oven 350 1 hour 0.33 kWh $.08/kWh $0.03
Microwave oven High 15 minutes 0.36 kWh $.08/kWh $0.03
Stove top, electric High (about 420 F) 1 hour 0.9 kWh $.08/kWh $0.07
Crockpot 200 7 hours 0.70 kWh $.08/kWh $0.06
Gas oven 350 1 hour 0.112 therm $.60/therm $0.07
Electric Convection oven 325 45 minutes 1.39 kWh $.08/kWh $0.11
Gas oven, electric ignition 350 1 hour 0.112 therm
+0.35 kWh $.60/therm $0.07
Electric oven (standard) 350 1 hour 2.0 kWh $.08/kWh $0.16
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Going by the electric stovetop, you'd be looking at $0.07/20 USD per bowl with the standard 3 minute cook. Microwave' actually looks to be a bit more expsnive (and I cook for 5 with nuked ramen, so far), but it's still something like an extra penny.