First one is either chocolate or pasta. I could take or leave other carbs, but pasta gets me fucked up every time. No-consequences chocolate is the bigger win, though.
Second one is chicken. Economically, other food makes more sense (like steak), but chicken is the better protein IMO. As long as discount/on sale doesn't mean lower quality or expired. If I have to be specific, boneless skinless chicken breasts.
Third is going to be pasta. Since chocolate is the bigger win for the first one, pasta goes here. Now here's why. Pasta is pretty diverse. We're talking spaghetti, ravioli, carbonara, alfredo, Mac & Cheese, hell, even ramen! Ramen is the real win here. Imagine breaking open a Cup Noodles or Top Ramen and you're getting Gyu-Kaku (Japanese steakhouse/ramen chain with locations in the west, so you can find one, maybe) ramen or better. That's a major cheat code. As for Mac & Cheese, sometimes you just want Kraft Dinner, but it's always at its best. Bad pasta can still show you some love, but great pasta for free when you eat the cheap stuff?
Third one is badly worded I think. Second one says it will always be inexpensive, but the third one says it's always high quality... but, it doesn't say you have to pay the higher price. So it's a mirror of the second one. Second one will always be cheap, but it's whatever quality, whereas the third one will always be good at whatever price. I still keep them in those slots though, because I don't care if my chicken isn't higher quality. I control that. And while I can make decent to good pasta (maybe even great, but I wouldn't say excellent, though my wife might), getting "excellent" pasta with no effort? Fuck yeah.
I also noticed "pasta" is very broad and categorical. If I have to specify which pasta... Ramen. Ramen is cheap (like 3-4 for $1) and good ramen is hard to come by. There are like a dozen noodle shops around me, but none of them are very good. I will drive 3 hours to a Gyu-Kaku for their ramen.
TL;DR: Chocolate, chicken, pasta (or ramen if I have to be specific)