I do not understand the mathematics behind the dilemma. I'm assuming only the firts chicks cost money, because down the line they will breed.
But feeding them, housing them - vitamins and doctoring costs a lot of money.
So anyone with couple or more chickens - how much does it cost to have them on the table? And realistically how many eggs do you get?
Broilers (chickens for meat) are usually males that just hit maturity. Before they go insane on hormones and fight other males, they become food. That takes around 6-8 weeks. So, at scale like supermarkets, not a ton of food goes into them. Likely more money goes into dressing (slaughter), packaging, and shipping.
Layers (les femmes chickitas) turn out eggs until they don't anymore, and then get turned into dog food or nuggets, or soup. They're turning corn into eggs. My parents have layers and get a 20lb bag of food once a month and get 2-4 eggs a day, depending on the weather.