Priced out tacos on Amazon they add up to ~$1.25 per taco. You can go to a taco tuesday deal and get the same price or cheaper, plus free chips and salsa, as just one example.

I don't know if it's true but a friend from Kaohshing told me almost no one cooks at home anymore as the food outside is cheap, convenient, and abundant.

You also have to consider what you're eating. You can buy caviar for home ($$$) and have hot dogs out ($)

And, you have to take into account your time. If it takes you an hour to prepare food vs 10 minutes to get food made for you then there is some value to getting those 50 mins back. Some people enjoy cooking. I do. But if my choices was to hang out with a friend for ~2hrs or say nah I can only meet for ~1hr because I gotta make dinner, I'd value that extra time with my friend more than zero.