So I was looking into whether it actually makes sense to hit up fast food on a busy weeknight instead of the grocery store, and honestly the math is kind of wild. Turns out the cheapest fast food options can legitimately beat grocery prices if you're in a time crunch.

McDonald's McChicken Value Meal at $4.99 is probably the most obvious one - getting a sandwich, fries and drink for that price would cost way more if you bought the ingredients separately. Same with Wendy's 4 for $4 deal, which lets you grab a junior bacon cheeseburger, nuggets, fries and a drink all at once.

Taco Bell's Crunchwrap Supreme combo runs around $5.69 and honestly it's hard to replicate that at home without spending more on tortillas, beans and cheese alone. Subway's footlong sub special at $6 is another one where the fresh ingredients would cost significantly more if you assembled it yourself.

Even Chipotle, which isn't super cheap, can work out if you eat half the burrito for dinner and save the rest for lunch the next day. You're looking at maybe $11-12 but that's two solid meals.

Not saying this should be your go-to strategy, but when you're exhausted after work and the kitchen's a mess, knowing the cheapest fast food options actually beat the grocery store is kind of a relief. Just don't make it a habit if you care about your health long-term.